added prescaler for 16 bit pwm in LPC1347 target
Fork of mbed-dev by
targets/hal/TARGET_RENESAS/TARGET_RZ_A1H/i2c_api.c@119:3921aeca8633, 2016-04-29 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Apr 29 01:15:11 2016 +0100
- Revision:
- 119:3921aeca8633
- Parent:
- 0:9b334a45a8ff
- Child:
- 144:ef7eb2e8f9f7
Synchronized with git revision fe9720f24b1adc71ab6962506ec51290f6afd270
Full URL: https://github.com/mbedmicro/mbed/commit/fe9720f24b1adc71ab6962506ec51290f6afd270/
[Renesas RZ/A1H] Enable asynchronous communications
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bogdanm | 0:9b334a45a8ff | 1 | /* mbed Microcontroller Library |
bogdanm | 0:9b334a45a8ff | 2 | * Copyright (c) 2006-2013 ARM Limited |
bogdanm | 0:9b334a45a8ff | 3 | * |
bogdanm | 0:9b334a45a8ff | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
bogdanm | 0:9b334a45a8ff | 5 | * you may not use this file except in compliance with the License. |
bogdanm | 0:9b334a45a8ff | 6 | * You may obtain a copy of the License at |
bogdanm | 0:9b334a45a8ff | 7 | * |
bogdanm | 0:9b334a45a8ff | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
bogdanm | 0:9b334a45a8ff | 9 | * |
bogdanm | 0:9b334a45a8ff | 10 | * Unless required by applicable law or agreed to in writing, software |
bogdanm | 0:9b334a45a8ff | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
bogdanm | 0:9b334a45a8ff | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
bogdanm | 0:9b334a45a8ff | 13 | * See the License for the specific language governing permissions and |
bogdanm | 0:9b334a45a8ff | 14 | * limitations under the License. |
bogdanm | 0:9b334a45a8ff | 15 | */ |
bogdanm | 0:9b334a45a8ff | 16 | #include "mbed_assert.h" |
mbed_official | 119:3921aeca8633 | 17 | #include "dma_api.h" |
bogdanm | 0:9b334a45a8ff | 18 | #include "i2c_api.h" |
bogdanm | 0:9b334a45a8ff | 19 | #include "cmsis.h" |
bogdanm | 0:9b334a45a8ff | 20 | #include "pinmap.h" |
bogdanm | 0:9b334a45a8ff | 21 | #include "r_typedefs.h" |
bogdanm | 0:9b334a45a8ff | 22 | |
bogdanm | 0:9b334a45a8ff | 23 | #include "riic_iodefine.h" |
bogdanm | 0:9b334a45a8ff | 24 | #include "RZ_A1_Init.h" |
bogdanm | 0:9b334a45a8ff | 25 | #include "MBRZA1H.h" |
bogdanm | 0:9b334a45a8ff | 26 | |
bogdanm | 0:9b334a45a8ff | 27 | volatile struct st_riic *RIIC[] = RIIC_ADDRESS_LIST; |
bogdanm | 0:9b334a45a8ff | 28 | |
bogdanm | 0:9b334a45a8ff | 29 | #define REG(N) \ |
mbed_official | 119:3921aeca8633 | 30 | RIIC[obj->i2c.i2c]->RIICn##N |
bogdanm | 0:9b334a45a8ff | 31 | |
bogdanm | 0:9b334a45a8ff | 32 | /* RIICnCR1 */ |
bogdanm | 0:9b334a45a8ff | 33 | #define CR1_RST (1 << 6) |
bogdanm | 0:9b334a45a8ff | 34 | #define CR1_ICE (1 << 7) |
bogdanm | 0:9b334a45a8ff | 35 | |
bogdanm | 0:9b334a45a8ff | 36 | /* RIICnCR2 */ |
bogdanm | 0:9b334a45a8ff | 37 | #define CR2_ST (1 << 1) |
bogdanm | 0:9b334a45a8ff | 38 | #define CR2_RS (1 << 2) |
bogdanm | 0:9b334a45a8ff | 39 | #define CR2_SP (1 << 3) |
bogdanm | 0:9b334a45a8ff | 40 | #define CR2_TRS (1 << 5) |
bogdanm | 0:9b334a45a8ff | 41 | #define CR2_BBSY (1 << 7) |
bogdanm | 0:9b334a45a8ff | 42 | |
bogdanm | 0:9b334a45a8ff | 43 | /* RIICnMR3 */ |
bogdanm | 0:9b334a45a8ff | 44 | #define MR3_ACKBT (1 << 3) |
bogdanm | 0:9b334a45a8ff | 45 | #define MR3_ACKWP (1 << 4) |
bogdanm | 0:9b334a45a8ff | 46 | #define MR3_WAIT (1 << 6) |
bogdanm | 0:9b334a45a8ff | 47 | |
bogdanm | 0:9b334a45a8ff | 48 | /* RIICnSER */ |
bogdanm | 0:9b334a45a8ff | 49 | #define SER_SAR0E (1 << 0) |
bogdanm | 0:9b334a45a8ff | 50 | |
bogdanm | 0:9b334a45a8ff | 51 | /* RIICnSR1 */ |
bogdanm | 0:9b334a45a8ff | 52 | #define SR1_AAS0 (1 << 0) |
bogdanm | 0:9b334a45a8ff | 53 | |
bogdanm | 0:9b334a45a8ff | 54 | /* RIICnSR2 */ |
bogdanm | 0:9b334a45a8ff | 55 | #define SR2_START (1 << 2) |
bogdanm | 0:9b334a45a8ff | 56 | #define SR2_STOP (1 << 3) |
bogdanm | 0:9b334a45a8ff | 57 | #define SR2_NACKF (1 << 4) |
bogdanm | 0:9b334a45a8ff | 58 | #define SR2_RDRF (1 << 5) |
bogdanm | 0:9b334a45a8ff | 59 | #define SR2_TEND (1 << 6) |
bogdanm | 0:9b334a45a8ff | 60 | #define SR2_TDRE (1 << 7) |
bogdanm | 0:9b334a45a8ff | 61 | |
bogdanm | 0:9b334a45a8ff | 62 | #define WAIT_TIMEOUT (3600000) /* Loop counter : Time-out is about 1s. By 3600000 loops, measured value is 969ms. */ |
bogdanm | 0:9b334a45a8ff | 63 | |
bogdanm | 0:9b334a45a8ff | 64 | static const PinMap PinMap_I2C_SDA[] = { |
bogdanm | 0:9b334a45a8ff | 65 | {P1_1 , I2C_0, 1}, |
bogdanm | 0:9b334a45a8ff | 66 | {P1_3 , I2C_1, 1}, |
bogdanm | 0:9b334a45a8ff | 67 | {P1_7 , I2C_3, 1}, |
bogdanm | 0:9b334a45a8ff | 68 | {NC , NC , 0} |
bogdanm | 0:9b334a45a8ff | 69 | }; |
bogdanm | 0:9b334a45a8ff | 70 | |
bogdanm | 0:9b334a45a8ff | 71 | static const PinMap PinMap_I2C_SCL[] = { |
bogdanm | 0:9b334a45a8ff | 72 | {P1_0 , I2C_0, 1}, |
bogdanm | 0:9b334a45a8ff | 73 | {P1_2 , I2C_1, 1}, |
bogdanm | 0:9b334a45a8ff | 74 | {P1_6 , I2C_3, 1}, |
bogdanm | 0:9b334a45a8ff | 75 | {NC , NC, 0} |
bogdanm | 0:9b334a45a8ff | 76 | }; |
bogdanm | 0:9b334a45a8ff | 77 | |
bogdanm | 0:9b334a45a8ff | 78 | static inline int i2c_status(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 79 | return REG(SR2.UINT8[0]); |
bogdanm | 0:9b334a45a8ff | 80 | } |
bogdanm | 0:9b334a45a8ff | 81 | |
bogdanm | 0:9b334a45a8ff | 82 | static void i2c_reg_reset(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 83 | /* full reset */ |
bogdanm | 0:9b334a45a8ff | 84 | REG(CR1.UINT8[0]) &= ~CR1_ICE; // CR1.ICE off |
bogdanm | 0:9b334a45a8ff | 85 | REG(CR1.UINT8[0]) |= CR1_RST; // CR1.IICRST on |
bogdanm | 0:9b334a45a8ff | 86 | REG(CR1.UINT8[0]) |= CR1_ICE; // CR1.ICE on |
bogdanm | 0:9b334a45a8ff | 87 | |
bogdanm | 0:9b334a45a8ff | 88 | REG(MR1.UINT8[0]) = 0x08; // P_phi /x 9bit (including Ack) |
bogdanm | 0:9b334a45a8ff | 89 | REG(SER.UINT8[0]) = 0x00; // no slave addr enabled |
bogdanm | 0:9b334a45a8ff | 90 | |
bogdanm | 0:9b334a45a8ff | 91 | /* set frequency */ |
mbed_official | 119:3921aeca8633 | 92 | REG(MR1.UINT8[0]) |= obj->i2c.pclk_bit; |
mbed_official | 119:3921aeca8633 | 93 | REG(BRL.UINT8[0]) = obj->i2c.width_low; |
mbed_official | 119:3921aeca8633 | 94 | REG(BRH.UINT8[0]) = obj->i2c.width_hi; |
bogdanm | 0:9b334a45a8ff | 95 | |
bogdanm | 0:9b334a45a8ff | 96 | REG(MR2.UINT8[0]) = 0x07; |
bogdanm | 0:9b334a45a8ff | 97 | REG(MR3.UINT8[0]) = 0x00; |
bogdanm | 0:9b334a45a8ff | 98 | |
bogdanm | 0:9b334a45a8ff | 99 | REG(FER.UINT8[0]) = 0x72; // SCLE, NFE enabled, TMOT |
bogdanm | 0:9b334a45a8ff | 100 | REG(IER.UINT8[0]) = 0x00; // no interrupt |
bogdanm | 0:9b334a45a8ff | 101 | |
bogdanm | 0:9b334a45a8ff | 102 | REG(CR1.UINT32) &= ~CR1_RST; // CR1.IICRST negate reset |
bogdanm | 0:9b334a45a8ff | 103 | } |
bogdanm | 0:9b334a45a8ff | 104 | |
bogdanm | 0:9b334a45a8ff | 105 | static inline int i2c_wait_RDRF(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 106 | int timeout = 0; |
bogdanm | 0:9b334a45a8ff | 107 | |
bogdanm | 0:9b334a45a8ff | 108 | /* There is no timeout, but the upper limit value is set to avoid an infinite loop. */ |
bogdanm | 0:9b334a45a8ff | 109 | while ((i2c_status(obj) & SR2_RDRF) == 0) { |
bogdanm | 0:9b334a45a8ff | 110 | timeout ++; |
bogdanm | 0:9b334a45a8ff | 111 | if (timeout >= WAIT_TIMEOUT) { |
bogdanm | 0:9b334a45a8ff | 112 | return -1; |
bogdanm | 0:9b334a45a8ff | 113 | } |
bogdanm | 0:9b334a45a8ff | 114 | } |
bogdanm | 0:9b334a45a8ff | 115 | |
bogdanm | 0:9b334a45a8ff | 116 | return 0; |
bogdanm | 0:9b334a45a8ff | 117 | } |
bogdanm | 0:9b334a45a8ff | 118 | |
bogdanm | 0:9b334a45a8ff | 119 | static int i2c_wait_TDRE(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 120 | int timeout = 0; |
bogdanm | 0:9b334a45a8ff | 121 | |
bogdanm | 0:9b334a45a8ff | 122 | /* There is no timeout, but the upper limit value is set to avoid an infinite loop. */ |
bogdanm | 0:9b334a45a8ff | 123 | while ((i2c_status(obj) & SR2_TDRE) == 0) { |
bogdanm | 0:9b334a45a8ff | 124 | timeout ++; |
bogdanm | 0:9b334a45a8ff | 125 | if (timeout >= WAIT_TIMEOUT) { |
bogdanm | 0:9b334a45a8ff | 126 | return -1; |
bogdanm | 0:9b334a45a8ff | 127 | } |
bogdanm | 0:9b334a45a8ff | 128 | } |
bogdanm | 0:9b334a45a8ff | 129 | |
bogdanm | 0:9b334a45a8ff | 130 | return 0; |
bogdanm | 0:9b334a45a8ff | 131 | } |
bogdanm | 0:9b334a45a8ff | 132 | |
bogdanm | 0:9b334a45a8ff | 133 | static int i2c_wait_TEND(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 134 | int timeout = 0; |
bogdanm | 0:9b334a45a8ff | 135 | |
bogdanm | 0:9b334a45a8ff | 136 | /* There is no timeout, but the upper limit value is set to avoid an infinite loop. */ |
bogdanm | 0:9b334a45a8ff | 137 | while ((i2c_status(obj) & SR2_TEND) == 0) { |
bogdanm | 0:9b334a45a8ff | 138 | timeout ++; |
bogdanm | 0:9b334a45a8ff | 139 | if (timeout >= WAIT_TIMEOUT) { |
bogdanm | 0:9b334a45a8ff | 140 | return -1; |
bogdanm | 0:9b334a45a8ff | 141 | } |
bogdanm | 0:9b334a45a8ff | 142 | } |
bogdanm | 0:9b334a45a8ff | 143 | |
bogdanm | 0:9b334a45a8ff | 144 | return 0; |
bogdanm | 0:9b334a45a8ff | 145 | } |
bogdanm | 0:9b334a45a8ff | 146 | |
bogdanm | 0:9b334a45a8ff | 147 | |
bogdanm | 0:9b334a45a8ff | 148 | static int i2c_wait_START(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 149 | int timeout = 0; |
bogdanm | 0:9b334a45a8ff | 150 | |
bogdanm | 0:9b334a45a8ff | 151 | /* There is no timeout, but the upper limit value is set to avoid an infinite loop. */ |
bogdanm | 0:9b334a45a8ff | 152 | while ((i2c_status(obj) & SR2_START) == 0) { |
bogdanm | 0:9b334a45a8ff | 153 | timeout ++; |
bogdanm | 0:9b334a45a8ff | 154 | if (timeout >= WAIT_TIMEOUT) { |
bogdanm | 0:9b334a45a8ff | 155 | return -1; |
bogdanm | 0:9b334a45a8ff | 156 | } |
bogdanm | 0:9b334a45a8ff | 157 | } |
bogdanm | 0:9b334a45a8ff | 158 | |
bogdanm | 0:9b334a45a8ff | 159 | return 0; |
bogdanm | 0:9b334a45a8ff | 160 | } |
bogdanm | 0:9b334a45a8ff | 161 | |
bogdanm | 0:9b334a45a8ff | 162 | static int i2c_wait_STOP(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 163 | int timeout = 0; |
bogdanm | 0:9b334a45a8ff | 164 | |
bogdanm | 0:9b334a45a8ff | 165 | /* There is no timeout, but the upper limit value is set to avoid an infinite loop. */ |
bogdanm | 0:9b334a45a8ff | 166 | while ((i2c_status(obj) & SR2_STOP) == 0) { |
bogdanm | 0:9b334a45a8ff | 167 | timeout ++; |
bogdanm | 0:9b334a45a8ff | 168 | if (timeout >= WAIT_TIMEOUT) { |
bogdanm | 0:9b334a45a8ff | 169 | return -1; |
bogdanm | 0:9b334a45a8ff | 170 | } |
bogdanm | 0:9b334a45a8ff | 171 | } |
bogdanm | 0:9b334a45a8ff | 172 | |
bogdanm | 0:9b334a45a8ff | 173 | return 0; |
bogdanm | 0:9b334a45a8ff | 174 | } |
bogdanm | 0:9b334a45a8ff | 175 | |
bogdanm | 0:9b334a45a8ff | 176 | static int i2c_set_STOP(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 177 | /* SR2.STOP = 0 */ |
bogdanm | 0:9b334a45a8ff | 178 | REG(SR2.UINT32) &= ~SR2_STOP; |
bogdanm | 0:9b334a45a8ff | 179 | /* Stop condition */ |
bogdanm | 0:9b334a45a8ff | 180 | REG(CR2.UINT32) |= CR2_SP; |
bogdanm | 0:9b334a45a8ff | 181 | |
bogdanm | 0:9b334a45a8ff | 182 | return 0; |
bogdanm | 0:9b334a45a8ff | 183 | } |
bogdanm | 0:9b334a45a8ff | 184 | |
bogdanm | 0:9b334a45a8ff | 185 | static void i2c_set_SR2_NACKF_STOP(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 186 | /* SR2.NACKF = 0 */ |
bogdanm | 0:9b334a45a8ff | 187 | REG(SR2.UINT32) &= ~SR2_NACKF; |
bogdanm | 0:9b334a45a8ff | 188 | /* SR2.STOP = 0 */ |
bogdanm | 0:9b334a45a8ff | 189 | REG(SR2.UINT32) &= ~SR2_STOP; |
bogdanm | 0:9b334a45a8ff | 190 | } |
bogdanm | 0:9b334a45a8ff | 191 | |
bogdanm | 0:9b334a45a8ff | 192 | static void i2c_set_MR3_NACK(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 193 | /* send a NOT ACK */ |
bogdanm | 0:9b334a45a8ff | 194 | REG(MR3.UINT32) |= MR3_ACKWP; |
bogdanm | 0:9b334a45a8ff | 195 | REG(MR3.UINT32) |= MR3_ACKBT; |
bogdanm | 0:9b334a45a8ff | 196 | REG(MR3.UINT32) &= ~MR3_ACKWP; |
bogdanm | 0:9b334a45a8ff | 197 | } |
bogdanm | 0:9b334a45a8ff | 198 | |
bogdanm | 0:9b334a45a8ff | 199 | static void i2c_set_MR3_ACK(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 200 | /* send a ACK */ |
bogdanm | 0:9b334a45a8ff | 201 | REG(MR3.UINT32) |= MR3_ACKWP; |
bogdanm | 0:9b334a45a8ff | 202 | REG(MR3.UINT32) &= ~MR3_ACKBT; |
bogdanm | 0:9b334a45a8ff | 203 | REG(MR3.UINT32) &= ~MR3_ACKWP; |
bogdanm | 0:9b334a45a8ff | 204 | } |
bogdanm | 0:9b334a45a8ff | 205 | |
bogdanm | 0:9b334a45a8ff | 206 | static inline void i2c_power_enable(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 207 | volatile uint8_t dummy; |
mbed_official | 119:3921aeca8633 | 208 | switch ((int)obj->i2c.i2c) { |
bogdanm | 0:9b334a45a8ff | 209 | case I2C_0: |
bogdanm | 0:9b334a45a8ff | 210 | CPGSTBCR9 &= ~(0x80); |
bogdanm | 0:9b334a45a8ff | 211 | break; |
bogdanm | 0:9b334a45a8ff | 212 | case I2C_1: |
bogdanm | 0:9b334a45a8ff | 213 | CPGSTBCR9 &= ~(0x40); |
bogdanm | 0:9b334a45a8ff | 214 | break; |
bogdanm | 0:9b334a45a8ff | 215 | case I2C_2: |
bogdanm | 0:9b334a45a8ff | 216 | CPGSTBCR9 &= ~(0x20); |
bogdanm | 0:9b334a45a8ff | 217 | break; |
bogdanm | 0:9b334a45a8ff | 218 | case I2C_3: |
bogdanm | 0:9b334a45a8ff | 219 | CPGSTBCR9 &= ~(0x10); |
bogdanm | 0:9b334a45a8ff | 220 | break; |
bogdanm | 0:9b334a45a8ff | 221 | } |
bogdanm | 0:9b334a45a8ff | 222 | dummy = CPGSTBCR9; |
bogdanm | 0:9b334a45a8ff | 223 | } |
bogdanm | 0:9b334a45a8ff | 224 | |
bogdanm | 0:9b334a45a8ff | 225 | void i2c_init(i2c_t *obj, PinName sda, PinName scl) { |
bogdanm | 0:9b334a45a8ff | 226 | /* determine the I2C to use */ |
bogdanm | 0:9b334a45a8ff | 227 | I2CName i2c_sda = (I2CName)pinmap_peripheral(sda, PinMap_I2C_SDA); |
bogdanm | 0:9b334a45a8ff | 228 | I2CName i2c_scl = (I2CName)pinmap_peripheral(scl, PinMap_I2C_SCL); |
mbed_official | 119:3921aeca8633 | 229 | obj->i2c.i2c = pinmap_merge(i2c_sda, i2c_scl); |
mbed_official | 119:3921aeca8633 | 230 | MBED_ASSERT((int)obj->i2c.i2c != NC); |
bogdanm | 0:9b334a45a8ff | 231 | |
bogdanm | 0:9b334a45a8ff | 232 | /* enable power */ |
bogdanm | 0:9b334a45a8ff | 233 | i2c_power_enable(obj); |
bogdanm | 0:9b334a45a8ff | 234 | |
bogdanm | 0:9b334a45a8ff | 235 | /* set default frequency at 100k */ |
bogdanm | 0:9b334a45a8ff | 236 | i2c_frequency(obj, 100000); |
bogdanm | 0:9b334a45a8ff | 237 | |
bogdanm | 0:9b334a45a8ff | 238 | pinmap_pinout(sda, PinMap_I2C_SDA); |
bogdanm | 0:9b334a45a8ff | 239 | pinmap_pinout(scl, PinMap_I2C_SCL); |
bogdanm | 0:9b334a45a8ff | 240 | |
mbed_official | 119:3921aeca8633 | 241 | obj->i2c.last_stop_flag = 1; |
bogdanm | 0:9b334a45a8ff | 242 | } |
bogdanm | 0:9b334a45a8ff | 243 | |
bogdanm | 0:9b334a45a8ff | 244 | inline int i2c_start(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 245 | int timeout = 0; |
bogdanm | 0:9b334a45a8ff | 246 | |
bogdanm | 0:9b334a45a8ff | 247 | while ((REG(CR2.UINT32) & CR2_BBSY) != 0) { |
bogdanm | 0:9b334a45a8ff | 248 | timeout ++; |
mbed_official | 119:3921aeca8633 | 249 | if (timeout >= obj->i2c.bbsy_wait_cnt) { |
bogdanm | 0:9b334a45a8ff | 250 | break; |
bogdanm | 0:9b334a45a8ff | 251 | } |
bogdanm | 0:9b334a45a8ff | 252 | } |
bogdanm | 0:9b334a45a8ff | 253 | /* Start Condition */ |
bogdanm | 0:9b334a45a8ff | 254 | REG(CR2.UINT8[0]) |= CR2_ST; |
bogdanm | 0:9b334a45a8ff | 255 | |
bogdanm | 0:9b334a45a8ff | 256 | return 0; |
bogdanm | 0:9b334a45a8ff | 257 | } |
bogdanm | 0:9b334a45a8ff | 258 | |
bogdanm | 0:9b334a45a8ff | 259 | static inline int i2c_restart(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 260 | /* SR2.START = 0 */ |
bogdanm | 0:9b334a45a8ff | 261 | REG(SR2.UINT32) &= ~SR2_START; |
bogdanm | 0:9b334a45a8ff | 262 | /* ReStart condition */ |
bogdanm | 0:9b334a45a8ff | 263 | REG(CR2.UINT32) |= CR2_RS; |
bogdanm | 0:9b334a45a8ff | 264 | |
bogdanm | 0:9b334a45a8ff | 265 | return 0; |
bogdanm | 0:9b334a45a8ff | 266 | } |
bogdanm | 0:9b334a45a8ff | 267 | |
bogdanm | 0:9b334a45a8ff | 268 | inline int i2c_stop(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 269 | (void)i2c_set_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 270 | (void)i2c_wait_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 271 | i2c_set_SR2_NACKF_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 272 | |
bogdanm | 0:9b334a45a8ff | 273 | return 0; |
bogdanm | 0:9b334a45a8ff | 274 | } |
bogdanm | 0:9b334a45a8ff | 275 | |
bogdanm | 0:9b334a45a8ff | 276 | static void i2c_set_err_noslave(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 277 | (void)i2c_set_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 278 | (void)i2c_wait_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 279 | i2c_set_SR2_NACKF_STOP(obj); |
mbed_official | 119:3921aeca8633 | 280 | obj->i2c.last_stop_flag = 1; |
bogdanm | 0:9b334a45a8ff | 281 | } |
bogdanm | 0:9b334a45a8ff | 282 | |
bogdanm | 0:9b334a45a8ff | 283 | static inline int i2c_do_write(i2c_t *obj, int value) { |
bogdanm | 0:9b334a45a8ff | 284 | int timeout = 0; |
bogdanm | 0:9b334a45a8ff | 285 | |
bogdanm | 0:9b334a45a8ff | 286 | /* There is no timeout, but the upper limit value is set to avoid an infinite loop. */ |
bogdanm | 0:9b334a45a8ff | 287 | while ((i2c_status(obj) & SR2_TDRE) == 0) { |
bogdanm | 0:9b334a45a8ff | 288 | timeout ++; |
bogdanm | 0:9b334a45a8ff | 289 | if (timeout >= WAIT_TIMEOUT) { |
bogdanm | 0:9b334a45a8ff | 290 | return -1; |
bogdanm | 0:9b334a45a8ff | 291 | } |
bogdanm | 0:9b334a45a8ff | 292 | } |
bogdanm | 0:9b334a45a8ff | 293 | /* write the data */ |
bogdanm | 0:9b334a45a8ff | 294 | REG(DRT.UINT32) = value; |
bogdanm | 0:9b334a45a8ff | 295 | |
bogdanm | 0:9b334a45a8ff | 296 | return 0; |
bogdanm | 0:9b334a45a8ff | 297 | } |
bogdanm | 0:9b334a45a8ff | 298 | |
bogdanm | 0:9b334a45a8ff | 299 | static inline int i2c_read_address_write(i2c_t *obj, int value) { |
bogdanm | 0:9b334a45a8ff | 300 | int status; |
bogdanm | 0:9b334a45a8ff | 301 | |
bogdanm | 0:9b334a45a8ff | 302 | status = i2c_wait_TDRE(obj); |
bogdanm | 0:9b334a45a8ff | 303 | if (status == 0) { |
bogdanm | 0:9b334a45a8ff | 304 | /* write the data */ |
bogdanm | 0:9b334a45a8ff | 305 | REG(DRT.UINT32) = value; |
bogdanm | 0:9b334a45a8ff | 306 | } |
bogdanm | 0:9b334a45a8ff | 307 | |
bogdanm | 0:9b334a45a8ff | 308 | return status; |
bogdanm | 0:9b334a45a8ff | 309 | |
bogdanm | 0:9b334a45a8ff | 310 | } |
bogdanm | 0:9b334a45a8ff | 311 | |
bogdanm | 0:9b334a45a8ff | 312 | static inline int i2c_do_read(i2c_t *obj, int last) { |
bogdanm | 0:9b334a45a8ff | 313 | if (last == 2) { |
bogdanm | 0:9b334a45a8ff | 314 | /* this time is befor last byte read */ |
bogdanm | 0:9b334a45a8ff | 315 | /* Set MR3 WAIT bit is 1 */; |
bogdanm | 0:9b334a45a8ff | 316 | REG(MR3.UINT32) |= MR3_WAIT; |
bogdanm | 0:9b334a45a8ff | 317 | } else if (last == 1) { |
bogdanm | 0:9b334a45a8ff | 318 | i2c_set_MR3_NACK(obj); |
bogdanm | 0:9b334a45a8ff | 319 | } else { |
bogdanm | 0:9b334a45a8ff | 320 | i2c_set_MR3_ACK(obj); |
bogdanm | 0:9b334a45a8ff | 321 | } |
bogdanm | 0:9b334a45a8ff | 322 | |
bogdanm | 0:9b334a45a8ff | 323 | /* return the data */ |
bogdanm | 0:9b334a45a8ff | 324 | return (REG(DRR.UINT32) & 0xFF); |
bogdanm | 0:9b334a45a8ff | 325 | } |
bogdanm | 0:9b334a45a8ff | 326 | |
bogdanm | 0:9b334a45a8ff | 327 | void i2c_frequency(i2c_t *obj, int hz) { |
bogdanm | 0:9b334a45a8ff | 328 | float64_t pclk_val; |
bogdanm | 0:9b334a45a8ff | 329 | float64_t wait_utime; |
bogdanm | 0:9b334a45a8ff | 330 | volatile float64_t bps; |
bogdanm | 0:9b334a45a8ff | 331 | volatile float64_t L_time; /* H Width period */ |
bogdanm | 0:9b334a45a8ff | 332 | volatile float64_t H_time; /* L Width period */ |
bogdanm | 0:9b334a45a8ff | 333 | uint32_t tmp_L_width; |
bogdanm | 0:9b334a45a8ff | 334 | uint32_t tmp_H_width; |
bogdanm | 0:9b334a45a8ff | 335 | uint32_t remainder; |
bogdanm | 0:9b334a45a8ff | 336 | uint32_t wk_cks = 0; |
bogdanm | 0:9b334a45a8ff | 337 | |
bogdanm | 0:9b334a45a8ff | 338 | /* set PCLK */ |
bogdanm | 0:9b334a45a8ff | 339 | if (false == RZ_A1_IsClockMode0()) { |
bogdanm | 0:9b334a45a8ff | 340 | pclk_val = (float64_t)CM1_RENESAS_RZ_A1_P0_CLK; |
bogdanm | 0:9b334a45a8ff | 341 | } else { |
bogdanm | 0:9b334a45a8ff | 342 | pclk_val = (float64_t)CM0_RENESAS_RZ_A1_P0_CLK; |
bogdanm | 0:9b334a45a8ff | 343 | } |
bogdanm | 0:9b334a45a8ff | 344 | |
bogdanm | 0:9b334a45a8ff | 345 | /* Min 10kHz, Max 400kHz */ |
bogdanm | 0:9b334a45a8ff | 346 | if (hz < 10000) { |
bogdanm | 0:9b334a45a8ff | 347 | bps = 10000; |
bogdanm | 0:9b334a45a8ff | 348 | } else if (hz > 400000) { |
bogdanm | 0:9b334a45a8ff | 349 | bps = 400000; |
bogdanm | 0:9b334a45a8ff | 350 | } else { |
bogdanm | 0:9b334a45a8ff | 351 | bps = (float64_t)hz; |
bogdanm | 0:9b334a45a8ff | 352 | } |
bogdanm | 0:9b334a45a8ff | 353 | |
bogdanm | 0:9b334a45a8ff | 354 | /* Calculation L width time */ |
bogdanm | 0:9b334a45a8ff | 355 | L_time = (1 / (2 * bps)); /* Harf period of frequency */ |
bogdanm | 0:9b334a45a8ff | 356 | H_time = L_time; |
bogdanm | 0:9b334a45a8ff | 357 | |
bogdanm | 0:9b334a45a8ff | 358 | /* Check I2C mode of Speed */ |
bogdanm | 0:9b334a45a8ff | 359 | if (bps > 100000) { |
bogdanm | 0:9b334a45a8ff | 360 | /* Fast-mode */ |
bogdanm | 0:9b334a45a8ff | 361 | L_time -= 102E-9; /* Falling time of SCL clock. */ |
bogdanm | 0:9b334a45a8ff | 362 | H_time -= 138E-9; /* Rising time of SCL clock. */ |
bogdanm | 0:9b334a45a8ff | 363 | /* Check L wideth */ |
bogdanm | 0:9b334a45a8ff | 364 | if (L_time < 1.3E-6) { |
bogdanm | 0:9b334a45a8ff | 365 | /* Wnen L width less than 1.3us */ |
bogdanm | 0:9b334a45a8ff | 366 | /* Subtract Rise up and down time for SCL from H/L width */ |
bogdanm | 0:9b334a45a8ff | 367 | L_time = 1.3E-6; |
bogdanm | 0:9b334a45a8ff | 368 | H_time = (1 / bps) - L_time - 138E-9 - 102E-9; |
bogdanm | 0:9b334a45a8ff | 369 | } |
bogdanm | 0:9b334a45a8ff | 370 | } |
bogdanm | 0:9b334a45a8ff | 371 | |
bogdanm | 0:9b334a45a8ff | 372 | tmp_L_width = (uint32_t)(L_time * pclk_val * 10); |
bogdanm | 0:9b334a45a8ff | 373 | tmp_L_width >>= 1; |
bogdanm | 0:9b334a45a8ff | 374 | wk_cks++; |
bogdanm | 0:9b334a45a8ff | 375 | while (tmp_L_width >= 341) { |
bogdanm | 0:9b334a45a8ff | 376 | tmp_L_width >>= 1; |
bogdanm | 0:9b334a45a8ff | 377 | wk_cks++; |
bogdanm | 0:9b334a45a8ff | 378 | } |
bogdanm | 0:9b334a45a8ff | 379 | remainder = tmp_L_width % 10; |
bogdanm | 0:9b334a45a8ff | 380 | tmp_L_width = ((tmp_L_width + 9) / 10) - 3; /* carry */ |
bogdanm | 0:9b334a45a8ff | 381 | |
bogdanm | 0:9b334a45a8ff | 382 | tmp_H_width = (uint32_t)(H_time * pclk_val * 10); |
bogdanm | 0:9b334a45a8ff | 383 | tmp_H_width >>= wk_cks; |
bogdanm | 0:9b334a45a8ff | 384 | if (remainder == 0) { |
bogdanm | 0:9b334a45a8ff | 385 | tmp_H_width = ((tmp_H_width + 9) / 10) - 3; /* carry */ |
bogdanm | 0:9b334a45a8ff | 386 | } else { |
bogdanm | 0:9b334a45a8ff | 387 | remainder += tmp_H_width % 10; |
bogdanm | 0:9b334a45a8ff | 388 | tmp_H_width = (tmp_H_width / 10) - 3; |
bogdanm | 0:9b334a45a8ff | 389 | if (remainder > 10) { |
bogdanm | 0:9b334a45a8ff | 390 | tmp_H_width += 1; /* fine adjustment */ |
bogdanm | 0:9b334a45a8ff | 391 | } |
bogdanm | 0:9b334a45a8ff | 392 | } |
bogdanm | 0:9b334a45a8ff | 393 | /* timeout of BBSY bit is minimum low width by frequency */ |
bogdanm | 0:9b334a45a8ff | 394 | /* so timeout calculates "(low width) * 2" by frequency */ |
bogdanm | 0:9b334a45a8ff | 395 | wait_utime = (L_time * 2) * 1000000; |
bogdanm | 0:9b334a45a8ff | 396 | /* 1 wait of BBSY bit is about 0.3us. if it's below 0.3us, wait count is set as 1. */ |
bogdanm | 0:9b334a45a8ff | 397 | if (wait_utime <= 0.3) { |
mbed_official | 119:3921aeca8633 | 398 | obj->i2c.bbsy_wait_cnt = 1; |
bogdanm | 0:9b334a45a8ff | 399 | } else { |
mbed_official | 119:3921aeca8633 | 400 | obj->i2c.bbsy_wait_cnt = (int)(wait_utime / 0.3); |
bogdanm | 0:9b334a45a8ff | 401 | } |
bogdanm | 0:9b334a45a8ff | 402 | |
bogdanm | 0:9b334a45a8ff | 403 | |
bogdanm | 0:9b334a45a8ff | 404 | /* I2C Rate */ |
mbed_official | 119:3921aeca8633 | 405 | obj->i2c.pclk_bit = (uint8_t)(0x10 * wk_cks); /* P_phi / xx */ |
mbed_official | 119:3921aeca8633 | 406 | obj->i2c.width_low = (uint8_t)(tmp_L_width | 0x000000E0); |
mbed_official | 119:3921aeca8633 | 407 | obj->i2c.width_hi = (uint8_t)(tmp_H_width | 0x000000E0); |
bogdanm | 0:9b334a45a8ff | 408 | |
bogdanm | 0:9b334a45a8ff | 409 | /* full reset */ |
bogdanm | 0:9b334a45a8ff | 410 | i2c_reg_reset(obj); |
bogdanm | 0:9b334a45a8ff | 411 | } |
bogdanm | 0:9b334a45a8ff | 412 | |
bogdanm | 0:9b334a45a8ff | 413 | int i2c_read(i2c_t *obj, int address, char *data, int length, int stop) { |
bogdanm | 0:9b334a45a8ff | 414 | int count = 0; |
bogdanm | 0:9b334a45a8ff | 415 | int status; |
bogdanm | 0:9b334a45a8ff | 416 | int value; |
bogdanm | 0:9b334a45a8ff | 417 | volatile uint32_t work_reg = 0; |
bogdanm | 0:9b334a45a8ff | 418 | |
bogdanm | 0:9b334a45a8ff | 419 | if(length <= 0) { |
bogdanm | 0:9b334a45a8ff | 420 | return 0; |
bogdanm | 0:9b334a45a8ff | 421 | } |
bogdanm | 0:9b334a45a8ff | 422 | i2c_set_MR3_ACK(obj); |
bogdanm | 0:9b334a45a8ff | 423 | /* There is a STOP condition for last processing */ |
mbed_official | 119:3921aeca8633 | 424 | if (obj->i2c.last_stop_flag != 0) { |
bogdanm | 0:9b334a45a8ff | 425 | status = i2c_start(obj); |
bogdanm | 0:9b334a45a8ff | 426 | if (status != 0) { |
bogdanm | 0:9b334a45a8ff | 427 | i2c_set_err_noslave(obj); |
bogdanm | 0:9b334a45a8ff | 428 | return I2C_ERROR_BUS_BUSY; |
bogdanm | 0:9b334a45a8ff | 429 | } |
bogdanm | 0:9b334a45a8ff | 430 | } |
mbed_official | 119:3921aeca8633 | 431 | obj->i2c.last_stop_flag = stop; |
bogdanm | 0:9b334a45a8ff | 432 | /* Send Slave address */ |
bogdanm | 0:9b334a45a8ff | 433 | status = i2c_read_address_write(obj, (address | 0x01)); |
bogdanm | 0:9b334a45a8ff | 434 | if (status != 0) { |
bogdanm | 0:9b334a45a8ff | 435 | i2c_set_err_noslave(obj); |
bogdanm | 0:9b334a45a8ff | 436 | return I2C_ERROR_NO_SLAVE; |
bogdanm | 0:9b334a45a8ff | 437 | } |
bogdanm | 0:9b334a45a8ff | 438 | /* wait RDRF */ |
bogdanm | 0:9b334a45a8ff | 439 | status = i2c_wait_RDRF(obj); |
bogdanm | 0:9b334a45a8ff | 440 | /* check ACK/NACK */ |
bogdanm | 0:9b334a45a8ff | 441 | if ((status != 0) || ((REG(SR2.UINT32) & SR2_NACKF) != 0)) { |
bogdanm | 0:9b334a45a8ff | 442 | /* Slave sends NACK */ |
bogdanm | 0:9b334a45a8ff | 443 | (void)i2c_set_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 444 | /* dummy read */ |
bogdanm | 0:9b334a45a8ff | 445 | value = REG(DRR.UINT32); |
bogdanm | 0:9b334a45a8ff | 446 | (void)i2c_wait_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 447 | i2c_set_SR2_NACKF_STOP(obj); |
mbed_official | 119:3921aeca8633 | 448 | obj->i2c.last_stop_flag = 1; |
bogdanm | 0:9b334a45a8ff | 449 | return I2C_ERROR_NO_SLAVE; |
bogdanm | 0:9b334a45a8ff | 450 | } |
bogdanm | 0:9b334a45a8ff | 451 | /* Read in all except last byte */ |
bogdanm | 0:9b334a45a8ff | 452 | if (length > 2) { |
bogdanm | 0:9b334a45a8ff | 453 | /* dummy read */ |
bogdanm | 0:9b334a45a8ff | 454 | value = REG(DRR.UINT32); |
bogdanm | 0:9b334a45a8ff | 455 | for (count = 0; count < (length - 1); count++) { |
bogdanm | 0:9b334a45a8ff | 456 | /* wait for it to arrive */ |
bogdanm | 0:9b334a45a8ff | 457 | status = i2c_wait_RDRF(obj); |
bogdanm | 0:9b334a45a8ff | 458 | if (status != 0) { |
bogdanm | 0:9b334a45a8ff | 459 | i2c_set_err_noslave(obj); |
bogdanm | 0:9b334a45a8ff | 460 | return I2C_ERROR_NO_SLAVE; |
bogdanm | 0:9b334a45a8ff | 461 | } |
bogdanm | 0:9b334a45a8ff | 462 | /* Recieve the data */ |
bogdanm | 0:9b334a45a8ff | 463 | if (count == (length - 2)) { |
bogdanm | 0:9b334a45a8ff | 464 | value = i2c_do_read(obj, 1); |
bogdanm | 0:9b334a45a8ff | 465 | } else if ((length >= 3) && (count == (length - 3))) { |
bogdanm | 0:9b334a45a8ff | 466 | value = i2c_do_read(obj, 2); |
bogdanm | 0:9b334a45a8ff | 467 | } else { |
bogdanm | 0:9b334a45a8ff | 468 | value = i2c_do_read(obj, 0); |
bogdanm | 0:9b334a45a8ff | 469 | } |
bogdanm | 0:9b334a45a8ff | 470 | data[count] = (char)value; |
bogdanm | 0:9b334a45a8ff | 471 | } |
bogdanm | 0:9b334a45a8ff | 472 | } else if (length == 2) { |
mbed_official | 119:3921aeca8633 | 473 | /* Set MR3 WAIT bit is 1 */ |
bogdanm | 0:9b334a45a8ff | 474 | REG(MR3.UINT32) |= MR3_WAIT; |
bogdanm | 0:9b334a45a8ff | 475 | /* dummy read */ |
bogdanm | 0:9b334a45a8ff | 476 | value = REG(DRR.UINT32); |
bogdanm | 0:9b334a45a8ff | 477 | /* wait for it to arrive */ |
bogdanm | 0:9b334a45a8ff | 478 | status = i2c_wait_RDRF(obj); |
bogdanm | 0:9b334a45a8ff | 479 | if (status != 0) { |
bogdanm | 0:9b334a45a8ff | 480 | i2c_set_err_noslave(obj); |
bogdanm | 0:9b334a45a8ff | 481 | return I2C_ERROR_NO_SLAVE; |
bogdanm | 0:9b334a45a8ff | 482 | } |
bogdanm | 0:9b334a45a8ff | 483 | i2c_set_MR3_NACK(obj); |
bogdanm | 0:9b334a45a8ff | 484 | data[count] = (char)REG(DRR.UINT32); |
bogdanm | 0:9b334a45a8ff | 485 | count++; |
bogdanm | 0:9b334a45a8ff | 486 | } else { |
bogdanm | 0:9b334a45a8ff | 487 | /* length == 1 */ |
mbed_official | 119:3921aeca8633 | 488 | /* Set MR3 WAIT bit is 1 */; |
bogdanm | 0:9b334a45a8ff | 489 | REG(MR3.UINT32) |= MR3_WAIT; |
bogdanm | 0:9b334a45a8ff | 490 | i2c_set_MR3_NACK(obj); |
bogdanm | 0:9b334a45a8ff | 491 | /* dummy read */ |
bogdanm | 0:9b334a45a8ff | 492 | value = REG(DRR.UINT32); |
bogdanm | 0:9b334a45a8ff | 493 | } |
bogdanm | 0:9b334a45a8ff | 494 | /* wait for it to arrive */ |
bogdanm | 0:9b334a45a8ff | 495 | status = i2c_wait_RDRF(obj); |
bogdanm | 0:9b334a45a8ff | 496 | if (status != 0) { |
bogdanm | 0:9b334a45a8ff | 497 | i2c_set_err_noslave(obj); |
bogdanm | 0:9b334a45a8ff | 498 | return I2C_ERROR_NO_SLAVE; |
bogdanm | 0:9b334a45a8ff | 499 | } |
bogdanm | 0:9b334a45a8ff | 500 | |
bogdanm | 0:9b334a45a8ff | 501 | /* If not repeated start, send stop. */ |
bogdanm | 0:9b334a45a8ff | 502 | if (stop) { |
bogdanm | 0:9b334a45a8ff | 503 | (void)i2c_set_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 504 | /* RIICnDRR read */ |
bogdanm | 0:9b334a45a8ff | 505 | value = (REG(DRR.UINT32) & 0xFF); |
bogdanm | 0:9b334a45a8ff | 506 | data[count] = (char)value; |
bogdanm | 0:9b334a45a8ff | 507 | /* RIICnMR3.WAIT = 0 */ |
bogdanm | 0:9b334a45a8ff | 508 | REG(MR3.UINT32) &= ~MR3_WAIT; |
bogdanm | 0:9b334a45a8ff | 509 | (void)i2c_wait_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 510 | i2c_set_SR2_NACKF_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 511 | } else { |
bogdanm | 0:9b334a45a8ff | 512 | (void)i2c_restart(obj); |
bogdanm | 0:9b334a45a8ff | 513 | /* RIICnDRR read */ |
bogdanm | 0:9b334a45a8ff | 514 | value = (REG(DRR.UINT32) & 0xFF); |
bogdanm | 0:9b334a45a8ff | 515 | data[count] = (char)value; |
bogdanm | 0:9b334a45a8ff | 516 | /* RIICnMR3.WAIT = 0 */ |
bogdanm | 0:9b334a45a8ff | 517 | REG(MR3.UINT32) &= ~MR3_WAIT; |
bogdanm | 0:9b334a45a8ff | 518 | (void)i2c_wait_START(obj); |
bogdanm | 0:9b334a45a8ff | 519 | /* SR2.START = 0 */ |
bogdanm | 0:9b334a45a8ff | 520 | REG(SR2.UINT32) &= ~SR2_START; |
bogdanm | 0:9b334a45a8ff | 521 | } |
bogdanm | 0:9b334a45a8ff | 522 | |
bogdanm | 0:9b334a45a8ff | 523 | return length; |
bogdanm | 0:9b334a45a8ff | 524 | } |
bogdanm | 0:9b334a45a8ff | 525 | |
bogdanm | 0:9b334a45a8ff | 526 | int i2c_write(i2c_t *obj, int address, const char *data, int length, int stop) { |
bogdanm | 0:9b334a45a8ff | 527 | int cnt; |
bogdanm | 0:9b334a45a8ff | 528 | int status; |
bogdanm | 0:9b334a45a8ff | 529 | |
bogdanm | 0:9b334a45a8ff | 530 | if(length <= 0) { |
bogdanm | 0:9b334a45a8ff | 531 | return 0; |
bogdanm | 0:9b334a45a8ff | 532 | } |
bogdanm | 0:9b334a45a8ff | 533 | |
bogdanm | 0:9b334a45a8ff | 534 | /* There is a STOP condition for last processing */ |
mbed_official | 119:3921aeca8633 | 535 | if (obj->i2c.last_stop_flag != 0) { |
bogdanm | 0:9b334a45a8ff | 536 | status = i2c_start(obj); |
bogdanm | 0:9b334a45a8ff | 537 | if (status != 0) { |
bogdanm | 0:9b334a45a8ff | 538 | i2c_set_err_noslave(obj); |
bogdanm | 0:9b334a45a8ff | 539 | return I2C_ERROR_BUS_BUSY; |
bogdanm | 0:9b334a45a8ff | 540 | } |
bogdanm | 0:9b334a45a8ff | 541 | } |
mbed_official | 119:3921aeca8633 | 542 | obj->i2c.last_stop_flag = stop; |
bogdanm | 0:9b334a45a8ff | 543 | /* Send Slave address */ |
bogdanm | 0:9b334a45a8ff | 544 | status = i2c_do_write(obj, address); |
bogdanm | 0:9b334a45a8ff | 545 | if (status != 0) { |
bogdanm | 0:9b334a45a8ff | 546 | i2c_set_err_noslave(obj); |
bogdanm | 0:9b334a45a8ff | 547 | return I2C_ERROR_NO_SLAVE; |
bogdanm | 0:9b334a45a8ff | 548 | } |
bogdanm | 0:9b334a45a8ff | 549 | /* Wait send end */ |
bogdanm | 0:9b334a45a8ff | 550 | status = i2c_wait_TEND(obj); |
bogdanm | 0:9b334a45a8ff | 551 | if ((status != 0) || ((REG(SR2.UINT32) & SR2_NACKF) != 0)) { |
bogdanm | 0:9b334a45a8ff | 552 | /* Slave sends NACK */ |
bogdanm | 0:9b334a45a8ff | 553 | i2c_set_err_noslave(obj); |
bogdanm | 0:9b334a45a8ff | 554 | return I2C_ERROR_NO_SLAVE; |
bogdanm | 0:9b334a45a8ff | 555 | } |
bogdanm | 0:9b334a45a8ff | 556 | /* Send Write data */ |
bogdanm | 0:9b334a45a8ff | 557 | for (cnt=0; cnt<length; cnt++) { |
bogdanm | 0:9b334a45a8ff | 558 | status = i2c_do_write(obj, data[cnt]); |
bogdanm | 0:9b334a45a8ff | 559 | if(status != 0) { |
bogdanm | 0:9b334a45a8ff | 560 | i2c_set_err_noslave(obj); |
bogdanm | 0:9b334a45a8ff | 561 | return cnt; |
bogdanm | 0:9b334a45a8ff | 562 | } else { |
bogdanm | 0:9b334a45a8ff | 563 | /* Wait send end */ |
bogdanm | 0:9b334a45a8ff | 564 | status = i2c_wait_TEND(obj); |
bogdanm | 0:9b334a45a8ff | 565 | if ((status != 0) || ((REG(SR2.UINT32) & SR2_NACKF) != 0)) { |
bogdanm | 0:9b334a45a8ff | 566 | /* Slave sends NACK */ |
bogdanm | 0:9b334a45a8ff | 567 | i2c_set_err_noslave(obj); |
bogdanm | 0:9b334a45a8ff | 568 | return I2C_ERROR_NO_SLAVE; |
bogdanm | 0:9b334a45a8ff | 569 | } |
bogdanm | 0:9b334a45a8ff | 570 | } |
bogdanm | 0:9b334a45a8ff | 571 | } |
bogdanm | 0:9b334a45a8ff | 572 | /* If not repeated start, send stop. */ |
bogdanm | 0:9b334a45a8ff | 573 | if (stop) { |
bogdanm | 0:9b334a45a8ff | 574 | (void)i2c_set_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 575 | (void)i2c_wait_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 576 | i2c_set_SR2_NACKF_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 577 | } else { |
bogdanm | 0:9b334a45a8ff | 578 | (void)i2c_restart(obj); |
bogdanm | 0:9b334a45a8ff | 579 | (void)i2c_wait_START(obj); |
bogdanm | 0:9b334a45a8ff | 580 | /* SR2.START = 0 */ |
bogdanm | 0:9b334a45a8ff | 581 | REG(SR2.UINT32) &= ~SR2_START; |
bogdanm | 0:9b334a45a8ff | 582 | |
bogdanm | 0:9b334a45a8ff | 583 | } |
bogdanm | 0:9b334a45a8ff | 584 | |
bogdanm | 0:9b334a45a8ff | 585 | return length; |
bogdanm | 0:9b334a45a8ff | 586 | } |
bogdanm | 0:9b334a45a8ff | 587 | |
bogdanm | 0:9b334a45a8ff | 588 | void i2c_reset(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 589 | (void)i2c_set_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 590 | (void)i2c_wait_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 591 | i2c_set_SR2_NACKF_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 592 | } |
bogdanm | 0:9b334a45a8ff | 593 | |
bogdanm | 0:9b334a45a8ff | 594 | int i2c_byte_read(i2c_t *obj, int last) { |
bogdanm | 0:9b334a45a8ff | 595 | int status; |
bogdanm | 0:9b334a45a8ff | 596 | int data; |
bogdanm | 0:9b334a45a8ff | 597 | |
bogdanm | 0:9b334a45a8ff | 598 | data = i2c_do_read(obj, last); |
bogdanm | 0:9b334a45a8ff | 599 | /* wait for it to arrive */ |
bogdanm | 0:9b334a45a8ff | 600 | status = i2c_wait_RDRF(obj); |
bogdanm | 0:9b334a45a8ff | 601 | if (status != 0) { |
bogdanm | 0:9b334a45a8ff | 602 | i2c_set_SR2_NACKF_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 603 | return I2C_ERROR_NO_SLAVE; |
bogdanm | 0:9b334a45a8ff | 604 | } |
bogdanm | 0:9b334a45a8ff | 605 | |
bogdanm | 0:9b334a45a8ff | 606 | return data; |
bogdanm | 0:9b334a45a8ff | 607 | } |
bogdanm | 0:9b334a45a8ff | 608 | |
bogdanm | 0:9b334a45a8ff | 609 | int i2c_byte_write(i2c_t *obj, int data) { |
bogdanm | 0:9b334a45a8ff | 610 | int ack = 0; |
bogdanm | 0:9b334a45a8ff | 611 | int status; |
bogdanm | 0:9b334a45a8ff | 612 | int timeout = 0; |
bogdanm | 0:9b334a45a8ff | 613 | |
bogdanm | 0:9b334a45a8ff | 614 | status = i2c_do_write(obj, (data & 0xFF)); |
bogdanm | 0:9b334a45a8ff | 615 | if (status != 0) { |
bogdanm | 0:9b334a45a8ff | 616 | i2c_set_SR2_NACKF_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 617 | } else { |
bogdanm | 0:9b334a45a8ff | 618 | while (((i2c_status(obj) & SR2_RDRF) == 0) && ((i2c_status(obj) & SR2_TEND) == 0)) { |
bogdanm | 0:9b334a45a8ff | 619 | timeout++; |
bogdanm | 0:9b334a45a8ff | 620 | if (timeout >= WAIT_TIMEOUT) { |
bogdanm | 0:9b334a45a8ff | 621 | return ack; |
bogdanm | 0:9b334a45a8ff | 622 | } |
bogdanm | 0:9b334a45a8ff | 623 | } |
bogdanm | 0:9b334a45a8ff | 624 | /* check ACK/NACK */ |
bogdanm | 0:9b334a45a8ff | 625 | if ((REG(SR2.UINT32) & SR2_NACKF) != 0) { |
bogdanm | 0:9b334a45a8ff | 626 | /* NACK */ |
bogdanm | 0:9b334a45a8ff | 627 | i2c_set_SR2_NACKF_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 628 | } else { |
bogdanm | 0:9b334a45a8ff | 629 | ack = 1; |
bogdanm | 0:9b334a45a8ff | 630 | } |
bogdanm | 0:9b334a45a8ff | 631 | } |
bogdanm | 0:9b334a45a8ff | 632 | |
bogdanm | 0:9b334a45a8ff | 633 | return ack; |
bogdanm | 0:9b334a45a8ff | 634 | } |
bogdanm | 0:9b334a45a8ff | 635 | |
bogdanm | 0:9b334a45a8ff | 636 | void i2c_slave_mode(i2c_t *obj, int enable_slave) { |
bogdanm | 0:9b334a45a8ff | 637 | if (enable_slave != 0) { |
bogdanm | 0:9b334a45a8ff | 638 | REG(SER.UINT32) |= SER_SAR0E; // only slave addr 0 is enabled |
bogdanm | 0:9b334a45a8ff | 639 | } else { |
bogdanm | 0:9b334a45a8ff | 640 | REG(SER.UINT32) &= ~SER_SAR0E; // no slave addr enabled |
bogdanm | 0:9b334a45a8ff | 641 | } |
bogdanm | 0:9b334a45a8ff | 642 | } |
bogdanm | 0:9b334a45a8ff | 643 | |
bogdanm | 0:9b334a45a8ff | 644 | int i2c_slave_receive(i2c_t *obj) { |
bogdanm | 0:9b334a45a8ff | 645 | int status; |
bogdanm | 0:9b334a45a8ff | 646 | int retval; |
bogdanm | 0:9b334a45a8ff | 647 | |
bogdanm | 0:9b334a45a8ff | 648 | status = (REG(SR1.UINT8[0]) & SR1_AAS0); |
bogdanm | 0:9b334a45a8ff | 649 | status |= (REG(CR2.UINT8[0]) & CR2_TRS) >> 4; |
bogdanm | 0:9b334a45a8ff | 650 | |
bogdanm | 0:9b334a45a8ff | 651 | switch(status) { |
bogdanm | 0:9b334a45a8ff | 652 | case 0x01: |
bogdanm | 0:9b334a45a8ff | 653 | /* the master is writing to this slave */ |
bogdanm | 0:9b334a45a8ff | 654 | retval = 3; |
bogdanm | 0:9b334a45a8ff | 655 | break; |
bogdanm | 0:9b334a45a8ff | 656 | case 0x02: |
bogdanm | 0:9b334a45a8ff | 657 | /* the master is writing to all slave */ |
bogdanm | 0:9b334a45a8ff | 658 | retval = 2; |
bogdanm | 0:9b334a45a8ff | 659 | break; |
bogdanm | 0:9b334a45a8ff | 660 | case 0x03: |
bogdanm | 0:9b334a45a8ff | 661 | /* the master has requested a read from this slave */ |
bogdanm | 0:9b334a45a8ff | 662 | retval = 1; |
bogdanm | 0:9b334a45a8ff | 663 | break; |
bogdanm | 0:9b334a45a8ff | 664 | default : |
bogdanm | 0:9b334a45a8ff | 665 | /* no data */ |
bogdanm | 0:9b334a45a8ff | 666 | retval = 0; |
bogdanm | 0:9b334a45a8ff | 667 | break; |
bogdanm | 0:9b334a45a8ff | 668 | } |
bogdanm | 0:9b334a45a8ff | 669 | |
bogdanm | 0:9b334a45a8ff | 670 | return retval; |
bogdanm | 0:9b334a45a8ff | 671 | } |
bogdanm | 0:9b334a45a8ff | 672 | |
bogdanm | 0:9b334a45a8ff | 673 | int i2c_slave_read(i2c_t *obj, char *data, int length) { |
bogdanm | 0:9b334a45a8ff | 674 | int timeout = 0; |
bogdanm | 0:9b334a45a8ff | 675 | int count; |
bogdanm | 0:9b334a45a8ff | 676 | int break_flg = 0; |
bogdanm | 0:9b334a45a8ff | 677 | |
bogdanm | 0:9b334a45a8ff | 678 | if(length <= 0) { |
bogdanm | 0:9b334a45a8ff | 679 | return 0; |
bogdanm | 0:9b334a45a8ff | 680 | } |
bogdanm | 0:9b334a45a8ff | 681 | for (count = 0; ((count < (length + 1)) && (break_flg == 0)); count++) { |
bogdanm | 0:9b334a45a8ff | 682 | /* There is no timeout, but the upper limit value is set to avoid an infinite loop. */ |
bogdanm | 0:9b334a45a8ff | 683 | while (((i2c_status(obj) & SR2_STOP) != 0) || ((i2c_status(obj) & SR2_RDRF) == 0)) { |
bogdanm | 0:9b334a45a8ff | 684 | if ((i2c_status(obj) & SR2_STOP) != 0) { |
bogdanm | 0:9b334a45a8ff | 685 | break_flg = 1; |
bogdanm | 0:9b334a45a8ff | 686 | break; |
bogdanm | 0:9b334a45a8ff | 687 | } |
bogdanm | 0:9b334a45a8ff | 688 | timeout ++; |
bogdanm | 0:9b334a45a8ff | 689 | if (timeout >= WAIT_TIMEOUT) { |
bogdanm | 0:9b334a45a8ff | 690 | return -1; |
bogdanm | 0:9b334a45a8ff | 691 | } |
bogdanm | 0:9b334a45a8ff | 692 | } |
bogdanm | 0:9b334a45a8ff | 693 | if (break_flg == 0) { |
bogdanm | 0:9b334a45a8ff | 694 | if (count == 0) { |
bogdanm | 0:9b334a45a8ff | 695 | /* dummy read */ |
bogdanm | 0:9b334a45a8ff | 696 | (void)REG(DRR.UINT32); |
bogdanm | 0:9b334a45a8ff | 697 | } else { |
bogdanm | 0:9b334a45a8ff | 698 | data[count - 1] = (char)(REG(DRR.UINT32) & 0xFF); |
bogdanm | 0:9b334a45a8ff | 699 | } |
bogdanm | 0:9b334a45a8ff | 700 | } |
bogdanm | 0:9b334a45a8ff | 701 | } |
bogdanm | 0:9b334a45a8ff | 702 | if (break_flg == 0) { |
bogdanm | 0:9b334a45a8ff | 703 | (void)i2c_wait_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 704 | } else { |
bogdanm | 0:9b334a45a8ff | 705 | if ((i2c_status(obj) & SR2_RDRF) != 0) { |
bogdanm | 0:9b334a45a8ff | 706 | if (count <= 1) { |
bogdanm | 0:9b334a45a8ff | 707 | /* fail safe */ |
bogdanm | 0:9b334a45a8ff | 708 | /* dummy read */ |
bogdanm | 0:9b334a45a8ff | 709 | (void)REG(DRR.UINT32); |
bogdanm | 0:9b334a45a8ff | 710 | } else { |
bogdanm | 0:9b334a45a8ff | 711 | data[count - 2] = (char)(REG(DRR.UINT32) & 0xFF); |
bogdanm | 0:9b334a45a8ff | 712 | } |
bogdanm | 0:9b334a45a8ff | 713 | } |
bogdanm | 0:9b334a45a8ff | 714 | } |
bogdanm | 0:9b334a45a8ff | 715 | /* SR2.STOP = 0 */ |
bogdanm | 0:9b334a45a8ff | 716 | REG(SR2.UINT32) &= ~SR2_STOP; |
bogdanm | 0:9b334a45a8ff | 717 | |
bogdanm | 0:9b334a45a8ff | 718 | return (count - 1); |
bogdanm | 0:9b334a45a8ff | 719 | } |
bogdanm | 0:9b334a45a8ff | 720 | |
bogdanm | 0:9b334a45a8ff | 721 | int i2c_slave_write(i2c_t *obj, const char *data, int length) { |
bogdanm | 0:9b334a45a8ff | 722 | int count = 0; |
bogdanm | 0:9b334a45a8ff | 723 | int status = 0; |
bogdanm | 0:9b334a45a8ff | 724 | |
bogdanm | 0:9b334a45a8ff | 725 | if(length <= 0) { |
bogdanm | 0:9b334a45a8ff | 726 | return 0; |
bogdanm | 0:9b334a45a8ff | 727 | } |
bogdanm | 0:9b334a45a8ff | 728 | |
bogdanm | 0:9b334a45a8ff | 729 | while ((count < length) && (status == 0)) { |
bogdanm | 0:9b334a45a8ff | 730 | status = i2c_do_write(obj, data[count]); |
bogdanm | 0:9b334a45a8ff | 731 | if(status == 0) { |
bogdanm | 0:9b334a45a8ff | 732 | /* Wait send end */ |
bogdanm | 0:9b334a45a8ff | 733 | status = i2c_wait_TEND(obj); |
bogdanm | 0:9b334a45a8ff | 734 | if ((status != 0) || ((count < (length - 1)) && ((REG(SR2.UINT32) & SR2_NACKF) != 0))) { |
bogdanm | 0:9b334a45a8ff | 735 | /* NACK */ |
bogdanm | 0:9b334a45a8ff | 736 | break; |
bogdanm | 0:9b334a45a8ff | 737 | } |
bogdanm | 0:9b334a45a8ff | 738 | } |
bogdanm | 0:9b334a45a8ff | 739 | count++; |
bogdanm | 0:9b334a45a8ff | 740 | } |
bogdanm | 0:9b334a45a8ff | 741 | /* dummy read */ |
bogdanm | 0:9b334a45a8ff | 742 | (void)REG(DRR.UINT32); |
bogdanm | 0:9b334a45a8ff | 743 | (void)i2c_wait_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 744 | i2c_set_SR2_NACKF_STOP(obj); |
bogdanm | 0:9b334a45a8ff | 745 | |
bogdanm | 0:9b334a45a8ff | 746 | return count; |
bogdanm | 0:9b334a45a8ff | 747 | } |
bogdanm | 0:9b334a45a8ff | 748 | |
bogdanm | 0:9b334a45a8ff | 749 | void i2c_slave_address(i2c_t *obj, int idx, uint32_t address, uint32_t mask) { |
bogdanm | 0:9b334a45a8ff | 750 | REG(SAR0.UINT32) = (address & 0xfffffffe); |
bogdanm | 0:9b334a45a8ff | 751 | } |
mbed_official | 119:3921aeca8633 | 752 | |
mbed_official | 119:3921aeca8633 | 753 | #if DEVICE_I2C_ASYNCH |
mbed_official | 119:3921aeca8633 | 754 | |
mbed_official | 119:3921aeca8633 | 755 | #define IRQ_NUM 4 |
mbed_official | 119:3921aeca8633 | 756 | #define IRQ_TX 0 |
mbed_official | 119:3921aeca8633 | 757 | #define IRQ_RX 1 |
mbed_official | 119:3921aeca8633 | 758 | #define IRQ_ERR1 2 |
mbed_official | 119:3921aeca8633 | 759 | #define IRQ_ERR2 3 |
mbed_official | 119:3921aeca8633 | 760 | |
mbed_official | 119:3921aeca8633 | 761 | static void i2c_irqs_set(i2c_t *obj, uint32_t enable); |
mbed_official | 119:3921aeca8633 | 762 | |
mbed_official | 119:3921aeca8633 | 763 | static void i2c0_tx_irq(void); |
mbed_official | 119:3921aeca8633 | 764 | static void i2c1_tx_irq(void); |
mbed_official | 119:3921aeca8633 | 765 | static void i2c2_tx_irq(void); |
mbed_official | 119:3921aeca8633 | 766 | static void i2c3_tx_irq(void); |
mbed_official | 119:3921aeca8633 | 767 | static void i2c0_rx_irq(void); |
mbed_official | 119:3921aeca8633 | 768 | static void i2c1_rx_irq(void); |
mbed_official | 119:3921aeca8633 | 769 | static void i2c2_rx_irq(void); |
mbed_official | 119:3921aeca8633 | 770 | static void i2c3_rx_irq(void); |
mbed_official | 119:3921aeca8633 | 771 | static void i2c0_al_irq(void); |
mbed_official | 119:3921aeca8633 | 772 | static void i2c1_al_irq(void); |
mbed_official | 119:3921aeca8633 | 773 | static void i2c2_al_irq(void); |
mbed_official | 119:3921aeca8633 | 774 | static void i2c3_al_irq(void); |
mbed_official | 119:3921aeca8633 | 775 | static void i2c0_to_irq(void); |
mbed_official | 119:3921aeca8633 | 776 | static void i2c1_to_irq(void); |
mbed_official | 119:3921aeca8633 | 777 | static void i2c2_to_irq(void); |
mbed_official | 119:3921aeca8633 | 778 | static void i2c3_to_irq(void); |
mbed_official | 119:3921aeca8633 | 779 | |
mbed_official | 119:3921aeca8633 | 780 | static const IRQn_Type irq_set_tbl[RIIC_COUNT][IRQ_NUM] = { |
mbed_official | 119:3921aeca8633 | 781 | {INTIICTEI0_IRQn, INTIICRI0_IRQn, INTIICALI0_IRQn, INTIICTMOI0_IRQn}, |
mbed_official | 119:3921aeca8633 | 782 | {INTIICTEI1_IRQn, INTIICRI1_IRQn, INTIICALI1_IRQn, INTIICTMOI1_IRQn}, |
mbed_official | 119:3921aeca8633 | 783 | {INTIICTEI2_IRQn, INTIICRI2_IRQn, INTIICALI2_IRQn, INTIICTMOI2_IRQn}, |
mbed_official | 119:3921aeca8633 | 784 | {INTIICTEI3_IRQn, INTIICRI3_IRQn, INTIICALI3_IRQn, INTIICTMOI3_IRQn}, |
mbed_official | 119:3921aeca8633 | 785 | }; |
mbed_official | 119:3921aeca8633 | 786 | |
mbed_official | 119:3921aeca8633 | 787 | static const IRQHandler hander_set_tbl[RIIC_COUNT][IRQ_NUM] = { |
mbed_official | 119:3921aeca8633 | 788 | {i2c0_tx_irq, i2c0_rx_irq, i2c0_al_irq, i2c0_to_irq}, |
mbed_official | 119:3921aeca8633 | 789 | {i2c1_tx_irq, i2c1_rx_irq, i2c1_al_irq, i2c1_to_irq}, |
mbed_official | 119:3921aeca8633 | 790 | {i2c2_tx_irq, i2c2_rx_irq, i2c2_al_irq, i2c2_to_irq}, |
mbed_official | 119:3921aeca8633 | 791 | {i2c3_tx_irq, i2c3_rx_irq, i2c3_al_irq, i2c3_to_irq}, |
mbed_official | 119:3921aeca8633 | 792 | }; |
mbed_official | 119:3921aeca8633 | 793 | |
mbed_official | 119:3921aeca8633 | 794 | struct i2c_global_data_s { |
mbed_official | 119:3921aeca8633 | 795 | i2c_t *async_obj; |
mbed_official | 119:3921aeca8633 | 796 | uint32_t async_callback, event, shouldStop, address; |
mbed_official | 119:3921aeca8633 | 797 | }; |
mbed_official | 119:3921aeca8633 | 798 | |
mbed_official | 119:3921aeca8633 | 799 | static struct i2c_global_data_s i2c_data[RIIC_COUNT]; |
mbed_official | 119:3921aeca8633 | 800 | |
mbed_official | 119:3921aeca8633 | 801 | static void i2c_transfer_finished(i2c_t *obj) |
mbed_official | 119:3921aeca8633 | 802 | { |
mbed_official | 119:3921aeca8633 | 803 | i2c_irqs_set(obj, 0); |
mbed_official | 119:3921aeca8633 | 804 | uint32_t index = obj->i2c.i2c; |
mbed_official | 119:3921aeca8633 | 805 | i2c_data[index].event = I2C_EVENT_TRANSFER_COMPLETE; |
mbed_official | 119:3921aeca8633 | 806 | i2c_data[index].async_obj = NULL; |
mbed_official | 119:3921aeca8633 | 807 | ((void (*)())i2c_data[index].async_callback)(); |
mbed_official | 119:3921aeca8633 | 808 | } |
mbed_official | 119:3921aeca8633 | 809 | |
mbed_official | 119:3921aeca8633 | 810 | static void i2c_tx_irq(IRQn_Type irq_num, uint32_t index) |
mbed_official | 119:3921aeca8633 | 811 | { |
mbed_official | 119:3921aeca8633 | 812 | i2c_t *obj = i2c_data[index].async_obj; |
mbed_official | 119:3921aeca8633 | 813 | if ((REG(SR2.UINT32) & SR2_NACKF)) { |
mbed_official | 119:3921aeca8633 | 814 | /* Slave sends NACK */ |
mbed_official | 119:3921aeca8633 | 815 | i2c_set_err_noslave(obj); |
mbed_official | 119:3921aeca8633 | 816 | i2c_data[index].event = I2C_EVENT_ERROR | I2C_EVENT_TRANSFER_EARLY_NACK; |
mbed_official | 119:3921aeca8633 | 817 | i2c_abort_asynch(obj); |
mbed_official | 119:3921aeca8633 | 818 | ((void (*)())i2c_data[index].async_callback)(); |
mbed_official | 119:3921aeca8633 | 819 | return; |
mbed_official | 119:3921aeca8633 | 820 | } |
mbed_official | 119:3921aeca8633 | 821 | if (obj->tx_buff.pos == obj->tx_buff.length) { |
mbed_official | 119:3921aeca8633 | 822 | /* All datas have tranferred */ |
mbed_official | 119:3921aeca8633 | 823 | |
mbed_official | 119:3921aeca8633 | 824 | /* Clear TEND */ |
mbed_official | 119:3921aeca8633 | 825 | REG(SR2.UINT32) &= ~(SR2_TEND); |
mbed_official | 119:3921aeca8633 | 826 | |
mbed_official | 119:3921aeca8633 | 827 | /* If not repeated start, send stop. */ |
mbed_official | 119:3921aeca8633 | 828 | if (i2c_data[index].shouldStop && obj->rx_buff.length == 0) { |
mbed_official | 119:3921aeca8633 | 829 | (void)i2c_set_STOP(obj); |
mbed_official | 119:3921aeca8633 | 830 | (void)i2c_wait_STOP(obj); |
mbed_official | 119:3921aeca8633 | 831 | i2c_set_SR2_NACKF_STOP(obj); |
mbed_official | 119:3921aeca8633 | 832 | i2c_transfer_finished(obj); |
mbed_official | 119:3921aeca8633 | 833 | } else { |
mbed_official | 119:3921aeca8633 | 834 | (void)i2c_restart(obj); |
mbed_official | 119:3921aeca8633 | 835 | (void)i2c_wait_START(obj); |
mbed_official | 119:3921aeca8633 | 836 | /* SR2.START = 0 */ |
mbed_official | 119:3921aeca8633 | 837 | REG(SR2.UINT32) &= ~SR2_START; |
mbed_official | 119:3921aeca8633 | 838 | if (obj->rx_buff.length) { |
mbed_official | 119:3921aeca8633 | 839 | /* Ready to read */ |
mbed_official | 119:3921aeca8633 | 840 | i2c_set_MR3_ACK(obj); |
mbed_official | 119:3921aeca8633 | 841 | |
mbed_official | 119:3921aeca8633 | 842 | /* Disable INTRIICTEI */ |
mbed_official | 119:3921aeca8633 | 843 | REG(IER.UINT8[0]) &= ~(1 << 6); |
mbed_official | 119:3921aeca8633 | 844 | |
mbed_official | 119:3921aeca8633 | 845 | /* Send Slave address */ |
mbed_official | 119:3921aeca8633 | 846 | if (i2c_read_address_write(obj, (i2c_data[index].address | 0x01)) != 0) { |
mbed_official | 119:3921aeca8633 | 847 | i2c_set_err_noslave(obj); |
mbed_official | 119:3921aeca8633 | 848 | i2c_data[index].event = I2C_EVENT_ERROR | I2C_EVENT_ERROR_NO_SLAVE; |
mbed_official | 119:3921aeca8633 | 849 | i2c_abort_asynch(obj); |
mbed_official | 119:3921aeca8633 | 850 | ((void (*)())i2c_data[index].async_callback)(); |
mbed_official | 119:3921aeca8633 | 851 | return; |
mbed_official | 119:3921aeca8633 | 852 | } |
mbed_official | 119:3921aeca8633 | 853 | } else { |
mbed_official | 119:3921aeca8633 | 854 | i2c_transfer_finished(obj); |
mbed_official | 119:3921aeca8633 | 855 | } |
mbed_official | 119:3921aeca8633 | 856 | } |
mbed_official | 119:3921aeca8633 | 857 | } else { |
mbed_official | 119:3921aeca8633 | 858 | /* Send next 1 byte */ |
mbed_official | 119:3921aeca8633 | 859 | if (i2c_do_write(obj, *(uint8_t *)obj->tx_buff.buffer) != 0) { |
mbed_official | 119:3921aeca8633 | 860 | i2c_set_err_noslave(obj); |
mbed_official | 119:3921aeca8633 | 861 | i2c_data[index].event = I2C_EVENT_ERROR | I2C_EVENT_ERROR_NO_SLAVE; |
mbed_official | 119:3921aeca8633 | 862 | i2c_abort_asynch(obj); |
mbed_official | 119:3921aeca8633 | 863 | ((void (*)())i2c_data[index].async_callback)(); |
mbed_official | 119:3921aeca8633 | 864 | return; |
mbed_official | 119:3921aeca8633 | 865 | } |
mbed_official | 119:3921aeca8633 | 866 | obj->tx_buff.buffer = (uint8_t *)obj->tx_buff.buffer + 1; |
mbed_official | 119:3921aeca8633 | 867 | ++obj->tx_buff.pos; |
mbed_official | 119:3921aeca8633 | 868 | } |
mbed_official | 119:3921aeca8633 | 869 | } |
mbed_official | 119:3921aeca8633 | 870 | |
mbed_official | 119:3921aeca8633 | 871 | static void i2c_rx_irq(IRQn_Type irq_num, uint32_t index) |
mbed_official | 119:3921aeca8633 | 872 | { |
mbed_official | 119:3921aeca8633 | 873 | i2c_t *obj = i2c_data[index].async_obj; |
mbed_official | 119:3921aeca8633 | 874 | if (obj->rx_buff.pos == SIZE_MAX) { |
mbed_official | 119:3921aeca8633 | 875 | if ((REG(SR2.UINT32) & SR2_NACKF) != 0) { |
mbed_official | 119:3921aeca8633 | 876 | /* Slave sends NACK */ |
mbed_official | 119:3921aeca8633 | 877 | (void)i2c_set_STOP(obj); |
mbed_official | 119:3921aeca8633 | 878 | /* dummy read */ |
mbed_official | 119:3921aeca8633 | 879 | if (REG(DRR.UINT32)) {} |
mbed_official | 119:3921aeca8633 | 880 | (void)i2c_wait_STOP(obj); |
mbed_official | 119:3921aeca8633 | 881 | i2c_set_SR2_NACKF_STOP(obj); |
mbed_official | 119:3921aeca8633 | 882 | obj->i2c.last_stop_flag = 1; |
mbed_official | 119:3921aeca8633 | 883 | |
mbed_official | 119:3921aeca8633 | 884 | i2c_data[index].event = I2C_EVENT_ERROR | I2C_EVENT_TRANSFER_EARLY_NACK; |
mbed_official | 119:3921aeca8633 | 885 | i2c_abort_asynch(obj); |
mbed_official | 119:3921aeca8633 | 886 | ((void (*)())i2c_data[index].async_callback)(); |
mbed_official | 119:3921aeca8633 | 887 | return; |
mbed_official | 119:3921aeca8633 | 888 | } |
mbed_official | 119:3921aeca8633 | 889 | if (obj->rx_buff.length == 1) { |
mbed_official | 119:3921aeca8633 | 890 | /* length == 1 */ |
mbed_official | 119:3921aeca8633 | 891 | /* Set MR3 WAIT bit is 1 */; |
mbed_official | 119:3921aeca8633 | 892 | REG(MR3.UINT32) |= MR3_WAIT; |
mbed_official | 119:3921aeca8633 | 893 | i2c_set_MR3_NACK(obj); |
mbed_official | 119:3921aeca8633 | 894 | } else if (obj->rx_buff.length == 2) { |
mbed_official | 119:3921aeca8633 | 895 | /* Set MR3 WAIT bit is 1 */ |
mbed_official | 119:3921aeca8633 | 896 | REG(MR3.UINT32) |= MR3_WAIT; |
mbed_official | 119:3921aeca8633 | 897 | } |
mbed_official | 119:3921aeca8633 | 898 | /* dummy read */ |
mbed_official | 119:3921aeca8633 | 899 | if (REG(DRR.UINT32)) {} |
mbed_official | 119:3921aeca8633 | 900 | obj->rx_buff.pos = 0; |
mbed_official | 119:3921aeca8633 | 901 | return; |
mbed_official | 119:3921aeca8633 | 902 | } |
mbed_official | 119:3921aeca8633 | 903 | if ((REG(SR2.UINT32) & SR2_NACKF) != 0) { |
mbed_official | 119:3921aeca8633 | 904 | /* Slave sends NACK */ |
mbed_official | 119:3921aeca8633 | 905 | i2c_set_err_noslave(obj); |
mbed_official | 119:3921aeca8633 | 906 | i2c_data[index].event = I2C_EVENT_ERROR | I2C_EVENT_TRANSFER_EARLY_NACK; |
mbed_official | 119:3921aeca8633 | 907 | i2c_abort_asynch(obj); |
mbed_official | 119:3921aeca8633 | 908 | ((void (*)())i2c_data[index].async_callback)(); |
mbed_official | 119:3921aeca8633 | 909 | return; |
mbed_official | 119:3921aeca8633 | 910 | } else { |
mbed_official | 119:3921aeca8633 | 911 | switch (obj->rx_buff.length - obj->rx_buff.pos) { |
mbed_official | 119:3921aeca8633 | 912 | case 1: |
mbed_official | 119:3921aeca8633 | 913 | /* Finished */ |
mbed_official | 119:3921aeca8633 | 914 | /* If not repeated start, send stop. */ |
mbed_official | 119:3921aeca8633 | 915 | if (i2c_data[index].shouldStop) { |
mbed_official | 119:3921aeca8633 | 916 | (void)i2c_set_STOP(obj); |
mbed_official | 119:3921aeca8633 | 917 | /* RIICnDRR read */ |
mbed_official | 119:3921aeca8633 | 918 | *(uint8_t *)obj->rx_buff.buffer = REG(DRR.UINT32) & 0xFF; |
mbed_official | 119:3921aeca8633 | 919 | /* RIICnMR3.WAIT = 0 */ |
mbed_official | 119:3921aeca8633 | 920 | REG(MR3.UINT32) &= ~MR3_WAIT; |
mbed_official | 119:3921aeca8633 | 921 | (void)i2c_wait_STOP(obj); |
mbed_official | 119:3921aeca8633 | 922 | i2c_set_SR2_NACKF_STOP(obj); |
mbed_official | 119:3921aeca8633 | 923 | } else { |
mbed_official | 119:3921aeca8633 | 924 | (void)i2c_restart(obj); |
mbed_official | 119:3921aeca8633 | 925 | /* RIICnDRR read */ |
mbed_official | 119:3921aeca8633 | 926 | *(uint8_t *)obj->rx_buff.buffer = REG(DRR.UINT32) & 0xFF; |
mbed_official | 119:3921aeca8633 | 927 | /* RIICnMR3.WAIT = 0 */ |
mbed_official | 119:3921aeca8633 | 928 | REG(MR3.UINT32) &= ~MR3_WAIT; |
mbed_official | 119:3921aeca8633 | 929 | (void)i2c_wait_START(obj); |
mbed_official | 119:3921aeca8633 | 930 | /* SR2.START = 0 */ |
mbed_official | 119:3921aeca8633 | 931 | REG(SR2.UINT32) &= ~SR2_START; |
mbed_official | 119:3921aeca8633 | 932 | } |
mbed_official | 119:3921aeca8633 | 933 | |
mbed_official | 119:3921aeca8633 | 934 | i2c_transfer_finished(obj); |
mbed_official | 119:3921aeca8633 | 935 | return; |
mbed_official | 119:3921aeca8633 | 936 | |
mbed_official | 119:3921aeca8633 | 937 | case 2: |
mbed_official | 119:3921aeca8633 | 938 | i2c_set_MR3_NACK(obj); |
mbed_official | 119:3921aeca8633 | 939 | break; |
mbed_official | 119:3921aeca8633 | 940 | |
mbed_official | 119:3921aeca8633 | 941 | case 3: |
mbed_official | 119:3921aeca8633 | 942 | /* this time is befor last byte read */ |
mbed_official | 119:3921aeca8633 | 943 | /* Set MR3 WAIT bit is 1 */ |
mbed_official | 119:3921aeca8633 | 944 | REG(MR3.UINT32) |= MR3_WAIT; |
mbed_official | 119:3921aeca8633 | 945 | break; |
mbed_official | 119:3921aeca8633 | 946 | |
mbed_official | 119:3921aeca8633 | 947 | default: |
mbed_official | 119:3921aeca8633 | 948 | i2c_set_MR3_ACK(obj); |
mbed_official | 119:3921aeca8633 | 949 | break; |
mbed_official | 119:3921aeca8633 | 950 | } |
mbed_official | 119:3921aeca8633 | 951 | *(uint8_t *)obj->rx_buff.buffer = REG(DRR.UINT32) & 0xFF; |
mbed_official | 119:3921aeca8633 | 952 | obj->rx_buff.buffer = (uint8_t *)obj->rx_buff.buffer + 1; |
mbed_official | 119:3921aeca8633 | 953 | ++obj->rx_buff.pos; |
mbed_official | 119:3921aeca8633 | 954 | } |
mbed_official | 119:3921aeca8633 | 955 | } |
mbed_official | 119:3921aeca8633 | 956 | |
mbed_official | 119:3921aeca8633 | 957 | static void i2c_err_irq(IRQn_Type irq_num, uint32_t index) |
mbed_official | 119:3921aeca8633 | 958 | { |
mbed_official | 119:3921aeca8633 | 959 | i2c_t *obj = i2c_data[index].async_obj; |
mbed_official | 119:3921aeca8633 | 960 | i2c_abort_asynch(obj); |
mbed_official | 119:3921aeca8633 | 961 | i2c_data[index].event = I2C_EVENT_ERROR; |
mbed_official | 119:3921aeca8633 | 962 | ((void (*)())i2c_data[index].async_callback)(); |
mbed_official | 119:3921aeca8633 | 963 | } |
mbed_official | 119:3921aeca8633 | 964 | |
mbed_official | 119:3921aeca8633 | 965 | /* TX handler */ |
mbed_official | 119:3921aeca8633 | 966 | static void i2c0_tx_irq(void) |
mbed_official | 119:3921aeca8633 | 967 | { |
mbed_official | 119:3921aeca8633 | 968 | i2c_tx_irq(INTIICTEI0_IRQn, 0); |
mbed_official | 119:3921aeca8633 | 969 | } |
mbed_official | 119:3921aeca8633 | 970 | |
mbed_official | 119:3921aeca8633 | 971 | static void i2c1_tx_irq(void) |
mbed_official | 119:3921aeca8633 | 972 | { |
mbed_official | 119:3921aeca8633 | 973 | i2c_tx_irq(INTIICTEI1_IRQn, 1); |
mbed_official | 119:3921aeca8633 | 974 | } |
mbed_official | 119:3921aeca8633 | 975 | |
mbed_official | 119:3921aeca8633 | 976 | static void i2c2_tx_irq(void) |
mbed_official | 119:3921aeca8633 | 977 | { |
mbed_official | 119:3921aeca8633 | 978 | i2c_tx_irq(INTIICTEI2_IRQn, 2); |
mbed_official | 119:3921aeca8633 | 979 | } |
mbed_official | 119:3921aeca8633 | 980 | |
mbed_official | 119:3921aeca8633 | 981 | static void i2c3_tx_irq(void) |
mbed_official | 119:3921aeca8633 | 982 | { |
mbed_official | 119:3921aeca8633 | 983 | i2c_tx_irq(INTIICTEI3_IRQn, 3); |
mbed_official | 119:3921aeca8633 | 984 | } |
mbed_official | 119:3921aeca8633 | 985 | |
mbed_official | 119:3921aeca8633 | 986 | /* RX handler */ |
mbed_official | 119:3921aeca8633 | 987 | static void i2c0_rx_irq(void) |
mbed_official | 119:3921aeca8633 | 988 | { |
mbed_official | 119:3921aeca8633 | 989 | i2c_rx_irq(INTIICRI0_IRQn, 0); |
mbed_official | 119:3921aeca8633 | 990 | } |
mbed_official | 119:3921aeca8633 | 991 | |
mbed_official | 119:3921aeca8633 | 992 | static void i2c1_rx_irq(void) |
mbed_official | 119:3921aeca8633 | 993 | { |
mbed_official | 119:3921aeca8633 | 994 | i2c_rx_irq(INTIICRI1_IRQn, 1); |
mbed_official | 119:3921aeca8633 | 995 | } |
mbed_official | 119:3921aeca8633 | 996 | |
mbed_official | 119:3921aeca8633 | 997 | static void i2c2_rx_irq(void) |
mbed_official | 119:3921aeca8633 | 998 | { |
mbed_official | 119:3921aeca8633 | 999 | i2c_rx_irq(INTIICRI2_IRQn, 2); |
mbed_official | 119:3921aeca8633 | 1000 | } |
mbed_official | 119:3921aeca8633 | 1001 | |
mbed_official | 119:3921aeca8633 | 1002 | static void i2c3_rx_irq(void) |
mbed_official | 119:3921aeca8633 | 1003 | { |
mbed_official | 119:3921aeca8633 | 1004 | i2c_rx_irq(INTIICRI3_IRQn, 3); |
mbed_official | 119:3921aeca8633 | 1005 | } |
mbed_official | 119:3921aeca8633 | 1006 | |
mbed_official | 119:3921aeca8633 | 1007 | /* Arbitration Lost handler */ |
mbed_official | 119:3921aeca8633 | 1008 | static void i2c0_al_irq(void) |
mbed_official | 119:3921aeca8633 | 1009 | { |
mbed_official | 119:3921aeca8633 | 1010 | i2c_err_irq(INTIICALI0_IRQn, 0); |
mbed_official | 119:3921aeca8633 | 1011 | } |
mbed_official | 119:3921aeca8633 | 1012 | |
mbed_official | 119:3921aeca8633 | 1013 | static void i2c1_al_irq(void) |
mbed_official | 119:3921aeca8633 | 1014 | { |
mbed_official | 119:3921aeca8633 | 1015 | i2c_err_irq(INTIICALI1_IRQn, 1); |
mbed_official | 119:3921aeca8633 | 1016 | } |
mbed_official | 119:3921aeca8633 | 1017 | |
mbed_official | 119:3921aeca8633 | 1018 | static void i2c2_al_irq(void) |
mbed_official | 119:3921aeca8633 | 1019 | { |
mbed_official | 119:3921aeca8633 | 1020 | i2c_err_irq(INTIICALI2_IRQn, 2); |
mbed_official | 119:3921aeca8633 | 1021 | } |
mbed_official | 119:3921aeca8633 | 1022 | |
mbed_official | 119:3921aeca8633 | 1023 | static void i2c3_al_irq(void) |
mbed_official | 119:3921aeca8633 | 1024 | { |
mbed_official | 119:3921aeca8633 | 1025 | i2c_err_irq(INTIICALI3_IRQn, 3); |
mbed_official | 119:3921aeca8633 | 1026 | } |
mbed_official | 119:3921aeca8633 | 1027 | |
mbed_official | 119:3921aeca8633 | 1028 | /* Timeout handler */ |
mbed_official | 119:3921aeca8633 | 1029 | static void i2c0_to_irq(void) |
mbed_official | 119:3921aeca8633 | 1030 | { |
mbed_official | 119:3921aeca8633 | 1031 | i2c_err_irq(INTIICTMOI0_IRQn, 0); |
mbed_official | 119:3921aeca8633 | 1032 | } |
mbed_official | 119:3921aeca8633 | 1033 | |
mbed_official | 119:3921aeca8633 | 1034 | static void i2c1_to_irq(void) |
mbed_official | 119:3921aeca8633 | 1035 | { |
mbed_official | 119:3921aeca8633 | 1036 | i2c_err_irq(INTIICTMOI1_IRQn, 1); |
mbed_official | 119:3921aeca8633 | 1037 | } |
mbed_official | 119:3921aeca8633 | 1038 | |
mbed_official | 119:3921aeca8633 | 1039 | static void i2c2_to_irq(void) |
mbed_official | 119:3921aeca8633 | 1040 | { |
mbed_official | 119:3921aeca8633 | 1041 | i2c_err_irq(INTIICTMOI2_IRQn, 2); |
mbed_official | 119:3921aeca8633 | 1042 | } |
mbed_official | 119:3921aeca8633 | 1043 | |
mbed_official | 119:3921aeca8633 | 1044 | static void i2c3_to_irq(void) |
mbed_official | 119:3921aeca8633 | 1045 | { |
mbed_official | 119:3921aeca8633 | 1046 | i2c_err_irq(INTIICTMOI3_IRQn, 3); |
mbed_official | 119:3921aeca8633 | 1047 | } |
mbed_official | 119:3921aeca8633 | 1048 | |
mbed_official | 119:3921aeca8633 | 1049 | static void i2c_irqs_set(i2c_t *obj, uint32_t enable) |
mbed_official | 119:3921aeca8633 | 1050 | { |
mbed_official | 119:3921aeca8633 | 1051 | int i; |
mbed_official | 119:3921aeca8633 | 1052 | const IRQn_Type *irqTable = irq_set_tbl[obj->i2c.i2c]; |
mbed_official | 119:3921aeca8633 | 1053 | const IRQHandler *handlerTable = hander_set_tbl[obj->i2c.i2c]; |
mbed_official | 119:3921aeca8633 | 1054 | for (i = 0; i < IRQ_NUM; ++i) { |
mbed_official | 119:3921aeca8633 | 1055 | if (enable) { |
mbed_official | 119:3921aeca8633 | 1056 | InterruptHandlerRegister(irqTable[i], handlerTable[i]); |
mbed_official | 119:3921aeca8633 | 1057 | GIC_SetPriority(irqTable[i], 5); |
mbed_official | 119:3921aeca8633 | 1058 | GIC_EnableIRQ(irqTable[i]); |
mbed_official | 119:3921aeca8633 | 1059 | } else { |
mbed_official | 119:3921aeca8633 | 1060 | GIC_DisableIRQ(irqTable[i]); |
mbed_official | 119:3921aeca8633 | 1061 | } |
mbed_official | 119:3921aeca8633 | 1062 | } |
mbed_official | 119:3921aeca8633 | 1063 | REG(IER.UINT8[0]) = enable ? 0x63 : 0x00; |
mbed_official | 119:3921aeca8633 | 1064 | } |
mbed_official | 119:3921aeca8633 | 1065 | |
mbed_official | 119:3921aeca8633 | 1066 | /****************************************************************************** |
mbed_official | 119:3921aeca8633 | 1067 | * ASYNCHRONOUS HAL |
mbed_official | 119:3921aeca8633 | 1068 | ******************************************************************************/ |
mbed_official | 119:3921aeca8633 | 1069 | |
mbed_official | 119:3921aeca8633 | 1070 | void i2c_transfer_asynch(i2c_t *obj, const void *tx, size_t tx_length, void *rx, size_t rx_length, uint32_t address, uint32_t stop, uint32_t handler, uint32_t event, DMAUsage hint) |
mbed_official | 119:3921aeca8633 | 1071 | { |
mbed_official | 119:3921aeca8633 | 1072 | MBED_ASSERT(obj); |
mbed_official | 119:3921aeca8633 | 1073 | MBED_ASSERT(tx ? tx_length : 1); |
mbed_official | 119:3921aeca8633 | 1074 | MBED_ASSERT(rx ? rx_length : 1); |
mbed_official | 119:3921aeca8633 | 1075 | MBED_ASSERT((REG(SER.UINT32) & SER_SAR0E) == 0); /* Slave mode */ |
mbed_official | 119:3921aeca8633 | 1076 | |
mbed_official | 119:3921aeca8633 | 1077 | obj->tx_buff.buffer = (void *)tx; |
mbed_official | 119:3921aeca8633 | 1078 | obj->tx_buff.length = tx_length; |
mbed_official | 119:3921aeca8633 | 1079 | obj->tx_buff.pos = 0; |
mbed_official | 119:3921aeca8633 | 1080 | obj->tx_buff.width = 8; |
mbed_official | 119:3921aeca8633 | 1081 | obj->rx_buff.buffer = rx; |
mbed_official | 119:3921aeca8633 | 1082 | obj->rx_buff.length = rx_length; |
mbed_official | 119:3921aeca8633 | 1083 | obj->rx_buff.pos = SIZE_MAX; |
mbed_official | 119:3921aeca8633 | 1084 | obj->rx_buff.width = 8; |
mbed_official | 119:3921aeca8633 | 1085 | i2c_data[obj->i2c.i2c].async_obj = obj; |
mbed_official | 119:3921aeca8633 | 1086 | i2c_data[obj->i2c.i2c].async_callback = handler; |
mbed_official | 119:3921aeca8633 | 1087 | i2c_data[obj->i2c.i2c].event = 0; |
mbed_official | 119:3921aeca8633 | 1088 | i2c_data[obj->i2c.i2c].shouldStop = stop; |
mbed_official | 119:3921aeca8633 | 1089 | i2c_data[obj->i2c.i2c].address = address; |
mbed_official | 119:3921aeca8633 | 1090 | i2c_irqs_set(obj, 1); |
mbed_official | 119:3921aeca8633 | 1091 | |
mbed_official | 119:3921aeca8633 | 1092 | /* There is a STOP condition for last processing */ |
mbed_official | 119:3921aeca8633 | 1093 | if (obj->i2c.last_stop_flag != 0) { |
mbed_official | 119:3921aeca8633 | 1094 | if (i2c_start(obj) != 0) { |
mbed_official | 119:3921aeca8633 | 1095 | i2c_set_err_noslave(obj); |
mbed_official | 119:3921aeca8633 | 1096 | i2c_data[obj->i2c.i2c].event = I2C_EVENT_ERROR | I2C_EVENT_ERROR_NO_SLAVE; |
mbed_official | 119:3921aeca8633 | 1097 | i2c_abort_asynch(obj); |
mbed_official | 119:3921aeca8633 | 1098 | ((void (*)())handler)(); |
mbed_official | 119:3921aeca8633 | 1099 | return; |
mbed_official | 119:3921aeca8633 | 1100 | } |
mbed_official | 119:3921aeca8633 | 1101 | } |
mbed_official | 119:3921aeca8633 | 1102 | obj->i2c.last_stop_flag = stop; |
mbed_official | 119:3921aeca8633 | 1103 | |
mbed_official | 119:3921aeca8633 | 1104 | if (rx_length && tx_length == 0) { |
mbed_official | 119:3921aeca8633 | 1105 | /* Ready to read */ |
mbed_official | 119:3921aeca8633 | 1106 | i2c_set_MR3_ACK(obj); |
mbed_official | 119:3921aeca8633 | 1107 | |
mbed_official | 119:3921aeca8633 | 1108 | /* Disable INTRIICTEI */ |
mbed_official | 119:3921aeca8633 | 1109 | REG(IER.UINT8[0]) &= ~(1 << 6); |
mbed_official | 119:3921aeca8633 | 1110 | |
mbed_official | 119:3921aeca8633 | 1111 | address |= 0x01; |
mbed_official | 119:3921aeca8633 | 1112 | } |
mbed_official | 119:3921aeca8633 | 1113 | /* Send Slave address */ |
mbed_official | 119:3921aeca8633 | 1114 | if (i2c_do_write(obj, address) != 0) { |
mbed_official | 119:3921aeca8633 | 1115 | i2c_set_err_noslave(obj); |
mbed_official | 119:3921aeca8633 | 1116 | i2c_data[obj->i2c.i2c].event = I2C_EVENT_ERROR | I2C_EVENT_ERROR_NO_SLAVE; |
mbed_official | 119:3921aeca8633 | 1117 | i2c_abort_asynch(obj); |
mbed_official | 119:3921aeca8633 | 1118 | ((void (*)())handler)(); |
mbed_official | 119:3921aeca8633 | 1119 | return; |
mbed_official | 119:3921aeca8633 | 1120 | } |
mbed_official | 119:3921aeca8633 | 1121 | } |
mbed_official | 119:3921aeca8633 | 1122 | |
mbed_official | 119:3921aeca8633 | 1123 | uint32_t i2c_irq_handler_asynch(i2c_t *obj) |
mbed_official | 119:3921aeca8633 | 1124 | { |
mbed_official | 119:3921aeca8633 | 1125 | return i2c_data[obj->i2c.i2c].event; |
mbed_official | 119:3921aeca8633 | 1126 | } |
mbed_official | 119:3921aeca8633 | 1127 | |
mbed_official | 119:3921aeca8633 | 1128 | uint8_t i2c_active(i2c_t *obj) |
mbed_official | 119:3921aeca8633 | 1129 | { |
mbed_official | 119:3921aeca8633 | 1130 | return i2c_data[obj->i2c.i2c].async_obj != NULL; |
mbed_official | 119:3921aeca8633 | 1131 | } |
mbed_official | 119:3921aeca8633 | 1132 | |
mbed_official | 119:3921aeca8633 | 1133 | void i2c_abort_asynch(i2c_t *obj) |
mbed_official | 119:3921aeca8633 | 1134 | { |
mbed_official | 119:3921aeca8633 | 1135 | i2c_data[obj->i2c.i2c].async_obj = NULL; |
mbed_official | 119:3921aeca8633 | 1136 | i2c_irqs_set(obj, 0); |
mbed_official | 119:3921aeca8633 | 1137 | i2c_reg_reset(obj); |
mbed_official | 119:3921aeca8633 | 1138 | } |
mbed_official | 119:3921aeca8633 | 1139 | |
mbed_official | 119:3921aeca8633 | 1140 | #endif |