E2I4-PL1-DDVT / tm_stm32f4_i2c

Dependencies:   DHT

tm_stm32f4_i2c.c@1:68a123e2d60b, 2018-09-18 (annotated)

Committer:
binoit
Date:
Tue Sep 18 08:06:44 2018 +0000
Revision:
1:68a123e2d60b
Parent:
0:3adb31fbd547 
Add_DHT22

Who changed what in which revision?

UserRevisionLine numberNew contents of line
binoit 0:3adb31fbd547 1 /**
binoit 0:3adb31fbd547 2 * |----------------------------------------------------------------------
binoit 0:3adb31fbd547 3 * | Copyright (C) Tilen Majerle, 2014
binoit 0:3adb31fbd547 4 * |
binoit 0:3adb31fbd547 5 * | This program is free software: you can redistribute it and/or modify
binoit 0:3adb31fbd547 6 * | it under the terms of the GNU General Public License as published by
binoit 0:3adb31fbd547 7 * | the Free Software Foundation, either version 3 of the License, or
binoit 0:3adb31fbd547 8 * | any later version.
binoit 0:3adb31fbd547 9 * |
binoit 0:3adb31fbd547 10 * | This program is distributed in the hope that it will be useful,
binoit 0:3adb31fbd547 11 * | but WITHOUT ANY WARRANTY; without even the implied warranty of
binoit 0:3adb31fbd547 12 * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
binoit 0:3adb31fbd547 13 * | GNU General Public License for more details.
binoit 0:3adb31fbd547 14 * |
binoit 0:3adb31fbd547 15 * | You should have received a copy of the GNU General Public License
binoit 0:3adb31fbd547 16 * | along with this program. If not, see <http://www.gnu.org/licenses/>.
binoit 0:3adb31fbd547 17 * |----------------------------------------------------------------------
binoit 0:3adb31fbd547 18 */
binoit 0:3adb31fbd547 19 #include "tm_stm32f4_i2c.h"
binoit 0:3adb31fbd547 20
binoit 0:3adb31fbd547 21 /* Private variables */
binoit 0:3adb31fbd547 22 static uint32_t TM_I2C_Timeout;
binoit 0:3adb31fbd547 23 static uint32_t TM_I2C_INT_Clocks[3] = {0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF};
binoit 0:3adb31fbd547 24
binoit 0:3adb31fbd547 25 /* Private defines */
binoit 0:3adb31fbd547 26 #define I2C_TRANSMITTER_MODE 0
binoit 0:3adb31fbd547 27 #define I2C_RECEIVER_MODE 1
binoit 0:3adb31fbd547 28 #define I2C_ACK_ENABLE 1
binoit 0:3adb31fbd547 29 #define I2C_ACK_DISABLE 0
binoit 0:3adb31fbd547 30
binoit 0:3adb31fbd547 31 /* Private functions */
binoit 0:3adb31fbd547 32 static void TM_I2C1_INT_InitPins(TM_I2C_PinsPack_t pinspack);
binoit 0:3adb31fbd547 33 static void TM_I2C2_INT_InitPins(TM_I2C_PinsPack_t pinspack);
binoit 0:3adb31fbd547 34 static void TM_I2C3_INT_InitPins(TM_I2C_PinsPack_t pinspack);
binoit 0:3adb31fbd547 35
binoit 0:3adb31fbd547 36 void TM_I2C_Init(I2C_TypeDef* I2Cx, TM_I2C_PinsPack_t pinspack, uint32_t clockSpeed) {
binoit 0:3adb31fbd547 37 I2C_InitTypeDef I2C_InitStruct;
binoit 0:3adb31fbd547 38
binoit 0:3adb31fbd547 39 if (I2Cx == I2C1) {
binoit 0:3adb31fbd547 40 /* Enable clock */
binoit 0:3adb31fbd547 41 RCC->APB1ENR |= RCC_APB1ENR_I2C1EN;
binoit 0:3adb31fbd547 42
binoit 0:3adb31fbd547 43 /* Enable pins */
binoit 0:3adb31fbd547 44 TM_I2C1_INT_InitPins(pinspack);
binoit 0:3adb31fbd547 45
binoit 0:3adb31fbd547 46 /* Check clock, set the lowest clock your devices support on the same I2C but */
binoit 0:3adb31fbd547 47 if (clockSpeed < TM_I2C_INT_Clocks[0]) {
binoit 0:3adb31fbd547 48 TM_I2C_INT_Clocks[0] = clockSpeed;
binoit 0:3adb31fbd547 49 }
binoit 0:3adb31fbd547 50
binoit 0:3adb31fbd547 51 /* Set values */
binoit 0:3adb31fbd547 52 I2C_InitStruct.I2C_ClockSpeed = TM_I2C_INT_Clocks[0];
binoit 0:3adb31fbd547 53 I2C_InitStruct.I2C_AcknowledgedAddress = TM_I2C1_ACKNOWLEDGED_ADDRESS;
binoit 0:3adb31fbd547 54 I2C_InitStruct.I2C_Mode = TM_I2C1_MODE;
binoit 0:3adb31fbd547 55 I2C_InitStruct.I2C_OwnAddress1 = TM_I2C1_OWN_ADDRESS;
binoit 0:3adb31fbd547 56 I2C_InitStruct.I2C_Ack = TM_I2C1_ACK;
binoit 0:3adb31fbd547 57 I2C_InitStruct.I2C_DutyCycle = TM_I2C1_DUTY_CYCLE;
binoit 0:3adb31fbd547 58 } else if (I2Cx == I2C2) {
binoit 0:3adb31fbd547 59 /* Enable clock */
binoit 0:3adb31fbd547 60 RCC->APB1ENR |= RCC_APB1ENR_I2C2EN;
binoit 0:3adb31fbd547 61
binoit 0:3adb31fbd547 62 /* Enable pins */
binoit 0:3adb31fbd547 63 TM_I2C2_INT_InitPins(pinspack);
binoit 0:3adb31fbd547 64
binoit 0:3adb31fbd547 65 /* Check clock, set the lowest clock your devices support on the same I2C but */
binoit 0:3adb31fbd547 66 if (clockSpeed < TM_I2C_INT_Clocks[1]) {
binoit 0:3adb31fbd547 67 TM_I2C_INT_Clocks[1] = clockSpeed;
binoit 0:3adb31fbd547 68 }
binoit 0:3adb31fbd547 69
binoit 0:3adb31fbd547 70 /* Set values */
binoit 0:3adb31fbd547 71 I2C_InitStruct.I2C_ClockSpeed = TM_I2C_INT_Clocks[1];
binoit 0:3adb31fbd547 72 I2C_InitStruct.I2C_AcknowledgedAddress = TM_I2C2_ACKNOWLEDGED_ADDRESS;
binoit 0:3adb31fbd547 73 I2C_InitStruct.I2C_Mode = TM_I2C2_MODE;
binoit 0:3adb31fbd547 74 I2C_InitStruct.I2C_OwnAddress1 = TM_I2C2_OWN_ADDRESS;
binoit 0:3adb31fbd547 75 I2C_InitStruct.I2C_Ack = TM_I2C2_ACK;
binoit 0:3adb31fbd547 76 I2C_InitStruct.I2C_DutyCycle = TM_I2C2_DUTY_CYCLE;
binoit 0:3adb31fbd547 77 } else if (I2Cx == I2C3) {
binoit 0:3adb31fbd547 78 /* Enable clock */
binoit 0:3adb31fbd547 79 RCC->APB1ENR |= RCC_APB1ENR_I2C3EN;
binoit 0:3adb31fbd547 80
binoit 0:3adb31fbd547 81 /* Enable pins */
binoit 0:3adb31fbd547 82 TM_I2C3_INT_InitPins(pinspack);
binoit 0:3adb31fbd547 83
binoit 0:3adb31fbd547 84 /* Check clock, set the lowest clock your devices support on the same I2C but */
binoit 0:3adb31fbd547 85 if (clockSpeed < TM_I2C_INT_Clocks[2]) {
binoit 0:3adb31fbd547 86 TM_I2C_INT_Clocks[2] = clockSpeed;
binoit 0:3adb31fbd547 87 }
binoit 0:3adb31fbd547 88
binoit 0:3adb31fbd547 89 /* Set values */
binoit 0:3adb31fbd547 90 I2C_InitStruct.I2C_ClockSpeed = TM_I2C_INT_Clocks[2];
binoit 0:3adb31fbd547 91 I2C_InitStruct.I2C_AcknowledgedAddress = TM_I2C3_ACKNOWLEDGED_ADDRESS;
binoit 0:3adb31fbd547 92 I2C_InitStruct.I2C_Mode = TM_I2C3_MODE;
binoit 0:3adb31fbd547 93 I2C_InitStruct.I2C_OwnAddress1 = TM_I2C3_OWN_ADDRESS;
binoit 0:3adb31fbd547 94 I2C_InitStruct.I2C_Ack = TM_I2C3_ACK;
binoit 0:3adb31fbd547 95 I2C_InitStruct.I2C_DutyCycle = TM_I2C3_DUTY_CYCLE;
binoit 0:3adb31fbd547 96 }
binoit 0:3adb31fbd547 97
binoit 0:3adb31fbd547 98 /* Disable I2C first */
binoit 0:3adb31fbd547 99 I2Cx->CR1 &= ~I2C_CR1_PE;
binoit 0:3adb31fbd547 100
binoit 0:3adb31fbd547 101 /* Initialize I2C */
binoit 0:3adb31fbd547 102 I2C_Init(I2Cx, &I2C_InitStruct);
binoit 0:3adb31fbd547 103
binoit 0:3adb31fbd547 104 /* Enable I2C */
binoit 0:3adb31fbd547 105 I2Cx->CR1 |= I2C_CR1_PE;
binoit 0:3adb31fbd547 106 }
binoit 0:3adb31fbd547 107
binoit 0:3adb31fbd547 108 uint8_t TM_I2C_Read(I2C_TypeDef* I2Cx, uint8_t address, uint8_t reg) {
binoit 0:3adb31fbd547 109 uint8_t received_data;
binoit 0:3adb31fbd547 110 TM_I2C_Start(I2Cx, address, I2C_TRANSMITTER_MODE, I2C_ACK_DISABLE);
binoit 0:3adb31fbd547 111 TM_I2C_WriteData(I2Cx, reg);
binoit 0:3adb31fbd547 112 TM_I2C_Stop(I2Cx);
binoit 0:3adb31fbd547 113 TM_I2C_Start(I2Cx, address, I2C_RECEIVER_MODE, I2C_ACK_DISABLE);
binoit 0:3adb31fbd547 114 received_data = TM_I2C_ReadNack(I2Cx);
binoit 0:3adb31fbd547 115 return received_data;
binoit 0:3adb31fbd547 116 }
binoit 0:3adb31fbd547 117
binoit 0:3adb31fbd547 118 void TM_I2C_ReadMulti(I2C_TypeDef* I2Cx, uint8_t address, uint8_t reg, uint8_t* data, uint16_t count) {
binoit 0:3adb31fbd547 119 TM_I2C_Start(I2Cx, address, I2C_TRANSMITTER_MODE, I2C_ACK_ENABLE);
binoit 0:3adb31fbd547 120 TM_I2C_WriteData(I2Cx, reg);
binoit 0:3adb31fbd547 121 //TM_I2C_Stop(I2Cx);
binoit 0:3adb31fbd547 122 TM_I2C_Start(I2Cx, address, I2C_RECEIVER_MODE, I2C_ACK_ENABLE);
binoit 0:3adb31fbd547 123 while (count--) {
binoit 0:3adb31fbd547 124 if (!count) {
binoit 0:3adb31fbd547 125 /* Last byte */
binoit 0:3adb31fbd547 126 *data++ = TM_I2C_ReadNack(I2Cx);
binoit 0:3adb31fbd547 127 } else {
binoit 0:3adb31fbd547 128 *data++ = TM_I2C_ReadAck(I2Cx);
binoit 0:3adb31fbd547 129 }
binoit 0:3adb31fbd547 130 }
binoit 0:3adb31fbd547 131 }
binoit 0:3adb31fbd547 132
binoit 0:3adb31fbd547 133 uint8_t TM_I2C_ReadNoRegister(I2C_TypeDef* I2Cx, uint8_t address) {
binoit 0:3adb31fbd547 134 uint8_t data;
binoit 0:3adb31fbd547 135 TM_I2C_Start(I2Cx, address, I2C_RECEIVER_MODE, I2C_ACK_ENABLE);
binoit 0:3adb31fbd547 136 /* Also stop condition happens */
binoit 0:3adb31fbd547 137 data = TM_I2C_ReadNack(I2Cx);
binoit 0:3adb31fbd547 138 return data;
binoit 0:3adb31fbd547 139 }
binoit 0:3adb31fbd547 140
binoit 0:3adb31fbd547 141 void TM_I2C_ReadMultiNoRegister(I2C_TypeDef* I2Cx, uint8_t address, uint8_t* data, uint16_t count) {
binoit 0:3adb31fbd547 142 TM_I2C_Start(I2Cx, address, I2C_RECEIVER_MODE, I2C_ACK_ENABLE);
binoit 0:3adb31fbd547 143 while (count--) {
binoit 0:3adb31fbd547 144 if (!count) {
binoit 0:3adb31fbd547 145 /* Last byte */
binoit 0:3adb31fbd547 146 *data = TM_I2C_ReadNack(I2Cx);
binoit 0:3adb31fbd547 147 } else {
binoit 0:3adb31fbd547 148 *data = TM_I2C_ReadAck(I2Cx);
binoit 0:3adb31fbd547 149 }
binoit 0:3adb31fbd547 150 }
binoit 0:3adb31fbd547 151 }
binoit 0:3adb31fbd547 152
binoit 0:3adb31fbd547 153 void TM_I2C_Write(I2C_TypeDef* I2Cx, uint8_t address, uint8_t reg, uint8_t data) {
binoit 0:3adb31fbd547 154 TM_I2C_Start(I2Cx, address, I2C_TRANSMITTER_MODE, I2C_ACK_DISABLE);
binoit 0:3adb31fbd547 155 TM_I2C_WriteData(I2Cx, reg);
binoit 0:3adb31fbd547 156 TM_I2C_WriteData(I2Cx, data);
binoit 0:3adb31fbd547 157 TM_I2C_Stop(I2Cx);
binoit 0:3adb31fbd547 158 }
binoit 0:3adb31fbd547 159
binoit 0:3adb31fbd547 160 void TM_I2C_WriteMulti(I2C_TypeDef* I2Cx, uint8_t address, uint8_t reg, uint8_t* data, uint16_t count) {
binoit 0:3adb31fbd547 161 TM_I2C_Start(I2Cx, address, I2C_TRANSMITTER_MODE, I2C_ACK_DISABLE);
binoit 0:3adb31fbd547 162 TM_I2C_WriteData(I2Cx, reg);
binoit 0:3adb31fbd547 163 while (count--) {
binoit 0:3adb31fbd547 164 TM_I2C_WriteData(I2Cx, *data++);
binoit 0:3adb31fbd547 165 }
binoit 0:3adb31fbd547 166 TM_I2C_Stop(I2Cx);
binoit 0:3adb31fbd547 167 }
binoit 0:3adb31fbd547 168
binoit 0:3adb31fbd547 169 void TM_I2C_WriteNoRegister(I2C_TypeDef* I2Cx, uint8_t address, uint8_t data) {
binoit 0:3adb31fbd547 170 TM_I2C_Start(I2Cx, address, I2C_TRANSMITTER_MODE, I2C_ACK_DISABLE);
binoit 0:3adb31fbd547 171 TM_I2C_WriteData(I2Cx, data);
binoit 0:3adb31fbd547 172 TM_I2C_Stop(I2Cx);
binoit 0:3adb31fbd547 173 }
binoit 0:3adb31fbd547 174
binoit 0:3adb31fbd547 175 void TM_I2C_WriteMultiNoRegister(I2C_TypeDef* I2Cx, uint8_t address, uint8_t* data, uint16_t count) {
binoit 0:3adb31fbd547 176 TM_I2C_Start(I2Cx, address, I2C_TRANSMITTER_MODE, I2C_ACK_DISABLE);
binoit 0:3adb31fbd547 177 while (count--) {
binoit 0:3adb31fbd547 178 TM_I2C_WriteData(I2Cx, *data++);
binoit 0:3adb31fbd547 179 }
binoit 0:3adb31fbd547 180 TM_I2C_Stop(I2Cx);
binoit 0:3adb31fbd547 181 }
binoit 0:3adb31fbd547 182
binoit 0:3adb31fbd547 183
binoit 0:3adb31fbd547 184 uint8_t TM_I2C_IsDeviceConnected(I2C_TypeDef* I2Cx, uint8_t address) {
binoit 0:3adb31fbd547 185 uint8_t connected = 0;
binoit 0:3adb31fbd547 186 /* Try to start, function will return 0 in case device will send ACK */
binoit 0:3adb31fbd547 187 if (!TM_I2C_Start(I2Cx, address, I2C_TRANSMITTER_MODE, I2C_ACK_ENABLE)) {
binoit 0:3adb31fbd547 188 connected = 1;
binoit 0:3adb31fbd547 189 }
binoit 0:3adb31fbd547 190
binoit 0:3adb31fbd547 191 /* STOP I2C */
binoit 0:3adb31fbd547 192 TM_I2C_Stop(I2Cx);
binoit 0:3adb31fbd547 193
binoit 0:3adb31fbd547 194 /* Return status */
binoit 0:3adb31fbd547 195 return connected;
binoit 0:3adb31fbd547 196 }
binoit 0:3adb31fbd547 197
binoit 0:3adb31fbd547 198 __weak void TM_I2C_InitCustomPinsCallback(I2C_TypeDef* I2Cx, uint16_t AlternateFunction) {
binoit 0:3adb31fbd547 199 /* Custom user function. */
binoit 0:3adb31fbd547 200 /* In case user needs functionality for custom pins, this function should be declared outside this library */
binoit 0:3adb31fbd547 201 }
binoit 0:3adb31fbd547 202
binoit 0:3adb31fbd547 203 /* Private functions */
binoit 0:3adb31fbd547 204 int16_t TM_I2C_Start(I2C_TypeDef* I2Cx, uint8_t address, uint8_t direction, uint8_t ack) {
binoit 0:3adb31fbd547 205 /* Generate I2C start pulse */
binoit 0:3adb31fbd547 206 I2Cx->CR1 |= I2C_CR1_START;
binoit 0:3adb31fbd547 207
binoit 0:3adb31fbd547 208 /* Wait till I2C is busy */
binoit 0:3adb31fbd547 209 TM_I2C_Timeout = TM_I2C_TIMEOUT;
binoit 0:3adb31fbd547 210 while (!(I2Cx->SR1 & I2C_SR1_SB)) {
binoit 0:3adb31fbd547 211 if (--TM_I2C_Timeout == 0x00) {
binoit 0:3adb31fbd547 212 return 1;
binoit 0:3adb31fbd547 213 }
binoit 0:3adb31fbd547 214 }
binoit 0:3adb31fbd547 215
binoit 0:3adb31fbd547 216 /* Enable ack if we select it */
binoit 0:3adb31fbd547 217 if (ack) {
binoit 0:3adb31fbd547 218 I2Cx->CR1 |= I2C_CR1_ACK;
binoit 0:3adb31fbd547 219 }
binoit 0:3adb31fbd547 220
binoit 0:3adb31fbd547 221 /* Send write/read bit */
binoit 0:3adb31fbd547 222 if (direction == I2C_TRANSMITTER_MODE) {
binoit 0:3adb31fbd547 223 /* Send address with zero last bit */
binoit 0:3adb31fbd547 224 I2Cx->DR = address & ~I2C_OAR1_ADD0;
binoit 0:3adb31fbd547 225
binoit 0:3adb31fbd547 226 /* Wait till finished */
binoit 0:3adb31fbd547 227 TM_I2C_Timeout = TM_I2C_TIMEOUT;
binoit 0:3adb31fbd547 228 while (!(I2Cx->SR1 & I2C_SR1_ADDR)) {
binoit 0:3adb31fbd547 229 if (--TM_I2C_Timeout == 0x00) {
binoit 0:3adb31fbd547 230 return 1;
binoit 0:3adb31fbd547 231 }
binoit 0:3adb31fbd547 232 }
binoit 0:3adb31fbd547 233 }
binoit 0:3adb31fbd547 234 if (direction == I2C_RECEIVER_MODE) {
binoit 0:3adb31fbd547 235 /* Send address with 1 last bit */
binoit 0:3adb31fbd547 236 I2Cx->DR = address | I2C_OAR1_ADD0;
binoit 0:3adb31fbd547 237
binoit 0:3adb31fbd547 238 /* Wait till finished */
binoit 0:3adb31fbd547 239 TM_I2C_Timeout = TM_I2C_TIMEOUT;
binoit 0:3adb31fbd547 240 while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) {
binoit 0:3adb31fbd547 241 if (--TM_I2C_Timeout == 0x00) {
binoit 0:3adb31fbd547 242 return 1;
binoit 0:3adb31fbd547 243 }
binoit 0:3adb31fbd547 244 }
binoit 0:3adb31fbd547 245 }
binoit 0:3adb31fbd547 246
binoit 0:3adb31fbd547 247 /* Read status register to clear ADDR flag */
binoit 0:3adb31fbd547 248 I2Cx->SR2;
binoit 0:3adb31fbd547 249
binoit 0:3adb31fbd547 250 /* Return 0, everything ok */
binoit 0:3adb31fbd547 251 return 0;
binoit 0:3adb31fbd547 252 }
binoit 0:3adb31fbd547 253
binoit 0:3adb31fbd547 254 void TM_I2C_WriteData(I2C_TypeDef* I2Cx, uint8_t data) {
binoit 0:3adb31fbd547 255 /* Wait till I2C is not busy anymore */
binoit 0:3adb31fbd547 256 TM_I2C_Timeout = TM_I2C_TIMEOUT;
binoit 0:3adb31fbd547 257 while (!(I2Cx->SR1 & I2C_SR1_TXE) && TM_I2C_Timeout) {
binoit 0:3adb31fbd547 258 TM_I2C_Timeout--;
binoit 0:3adb31fbd547 259 }
binoit 0:3adb31fbd547 260
binoit 0:3adb31fbd547 261 /* Send I2C data */
binoit 0:3adb31fbd547 262 I2Cx->DR = data;
binoit 0:3adb31fbd547 263 }
binoit 0:3adb31fbd547 264
binoit 0:3adb31fbd547 265 uint8_t TM_I2C_ReadAck(I2C_TypeDef* I2Cx) {
binoit 0:3adb31fbd547 266 uint8_t data;
binoit 0:3adb31fbd547 267
binoit 0:3adb31fbd547 268 /* Enable ACK */
binoit 0:3adb31fbd547 269 I2Cx->CR1 |= I2C_CR1_ACK;
binoit 0:3adb31fbd547 270
binoit 0:3adb31fbd547 271 /* Wait till not received */
binoit 0:3adb31fbd547 272 TM_I2C_Timeout = TM_I2C_TIMEOUT;
binoit 0:3adb31fbd547 273 while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_RECEIVED)) {
binoit 0:3adb31fbd547 274 if (--TM_I2C_Timeout == 0x00) {
binoit 0:3adb31fbd547 275 return 1;
binoit 0:3adb31fbd547 276 }
binoit 0:3adb31fbd547 277 }
binoit 0:3adb31fbd547 278
binoit 0:3adb31fbd547 279 /* Read data */
binoit 0:3adb31fbd547 280 data = I2Cx->DR;
binoit 0:3adb31fbd547 281
binoit 0:3adb31fbd547 282 /* Return data */
binoit 0:3adb31fbd547 283 return data;
binoit 0:3adb31fbd547 284 }
binoit 0:3adb31fbd547 285
binoit 0:3adb31fbd547 286 uint8_t TM_I2C_ReadNack(I2C_TypeDef* I2Cx) {
binoit 0:3adb31fbd547 287 uint8_t data;
binoit 0:3adb31fbd547 288
binoit 0:3adb31fbd547 289 /* Disable ACK */
binoit 0:3adb31fbd547 290 I2Cx->CR1 &= ~I2C_CR1_ACK;
binoit 0:3adb31fbd547 291
binoit 0:3adb31fbd547 292 /* Generate stop */
binoit 0:3adb31fbd547 293 I2Cx->CR1 |= I2C_CR1_STOP;
binoit 0:3adb31fbd547 294
binoit 0:3adb31fbd547 295 /* Wait till received */
binoit 0:3adb31fbd547 296 TM_I2C_Timeout = TM_I2C_TIMEOUT;
binoit 0:3adb31fbd547 297 while (!I2C_CheckEvent(I2Cx, I2C_EVENT_MASTER_BYTE_RECEIVED)) {
binoit 0:3adb31fbd547 298 if (--TM_I2C_Timeout == 0x00) {
binoit 0:3adb31fbd547 299 return 1;
binoit 0:3adb31fbd547 300 }
binoit 0:3adb31fbd547 301 }
binoit 0:3adb31fbd547 302
binoit 0:3adb31fbd547 303 /* Read data */
binoit 0:3adb31fbd547 304 data = I2Cx->DR;
binoit 0:3adb31fbd547 305
binoit 0:3adb31fbd547 306 /* Return data */
binoit 0:3adb31fbd547 307 return data;
binoit 0:3adb31fbd547 308 }
binoit 0:3adb31fbd547 309
binoit 0:3adb31fbd547 310 uint8_t TM_I2C_Stop(I2C_TypeDef* I2Cx) {
binoit 0:3adb31fbd547 311 /* Wait till transmitter not empty */
binoit 0:3adb31fbd547 312 TM_I2C_Timeout = TM_I2C_TIMEOUT;
binoit 0:3adb31fbd547 313 while (((!(I2Cx->SR1 & I2C_SR1_TXE)) || (!(I2Cx->SR1 & I2C_SR1_BTF)))) {
binoit 0:3adb31fbd547 314 if (--TM_I2C_Timeout == 0x00) {
binoit 0:3adb31fbd547 315 return 1;
binoit 0:3adb31fbd547 316 }
binoit 0:3adb31fbd547 317 }
binoit 0:3adb31fbd547 318
binoit 0:3adb31fbd547 319 /* Generate stop */
binoit 0:3adb31fbd547 320 I2Cx->CR1 |= I2C_CR1_STOP;
binoit 0:3adb31fbd547 321
binoit 0:3adb31fbd547 322 /* Return 0, everything ok */
binoit 0:3adb31fbd547 323 return 0;
binoit 0:3adb31fbd547 324 }
binoit 0:3adb31fbd547 325
binoit 0:3adb31fbd547 326
binoit 0:3adb31fbd547 327
binoit 0:3adb31fbd547 328
binoit 0:3adb31fbd547 329 /* Private functions */
binoit 0:3adb31fbd547 330 static void TM_I2C1_INT_InitPins(TM_I2C_PinsPack_t pinspack) {
binoit 0:3adb31fbd547 331 /* Init pins */
binoit 0:3adb31fbd547 332 #if defined(GPIOB)
binoit 0:3adb31fbd547 333 if (pinspack == TM_I2C_PinsPack_1) {
binoit 0:3adb31fbd547 334 TM_GPIO_InitAlternate(GPIOB, GPIO_PIN_6 | GPIO_PIN_7, TM_GPIO_OType_OD, TM_GPIO_PuPd_UP, TM_GPIO_Speed_Medium, GPIO_AF_I2C1);
binoit 0:3adb31fbd547 335 }
binoit 0:3adb31fbd547 336 #endif
binoit 0:3adb31fbd547 337 #if defined(GPIOB)
binoit 0:3adb31fbd547 338 if (pinspack == TM_I2C_PinsPack_2) {
binoit 0:3adb31fbd547 339 TM_GPIO_InitAlternate(GPIOB, GPIO_PIN_8 | GPIO_PIN_9, TM_GPIO_OType_OD, TM_GPIO_PuPd_UP, TM_GPIO_Speed_Medium, GPIO_AF_I2C1);
binoit 0:3adb31fbd547 340 }
binoit 0:3adb31fbd547 341 #endif
binoit 0:3adb31fbd547 342 #if defined(GPIOB)
binoit 0:3adb31fbd547 343 if (pinspack == TM_I2C_PinsPack_3) {
binoit 0:3adb31fbd547 344 TM_GPIO_InitAlternate(GPIOB, GPIO_PIN_6 | GPIO_PIN_9, TM_GPIO_OType_OD, TM_GPIO_PuPd_UP, TM_GPIO_Speed_Medium, GPIO_AF_I2C1);
binoit 0:3adb31fbd547 345 }
binoit 0:3adb31fbd547 346 #endif
binoit 0:3adb31fbd547 347 if (pinspack == TM_I2C_PinsPack_Custom) {
binoit 0:3adb31fbd547 348 /* Init custom pins, callback function */
binoit 0:3adb31fbd547 349 TM_I2C_InitCustomPinsCallback(I2C1, GPIO_AF_I2C1);
binoit 0:3adb31fbd547 350 }
binoit 0:3adb31fbd547 351 }
binoit 0:3adb31fbd547 352
binoit 0:3adb31fbd547 353 static void TM_I2C2_INT_InitPins(TM_I2C_PinsPack_t pinspack) {
binoit 0:3adb31fbd547 354 /* Init pins */
binoit 0:3adb31fbd547 355 #if defined(GPIOB)
binoit 0:3adb31fbd547 356 if (pinspack == TM_I2C_PinsPack_1) {
binoit 0:3adb31fbd547 357 TM_GPIO_InitAlternate(GPIOB, GPIO_PIN_10 | GPIO_PIN_11, TM_GPIO_OType_OD, TM_GPIO_PuPd_UP, TM_GPIO_Speed_Medium, GPIO_AF_I2C2);
binoit 0:3adb31fbd547 358 }
binoit 0:3adb31fbd547 359 #endif
binoit 0:3adb31fbd547 360 #if defined(GPIOF)
binoit 0:3adb31fbd547 361 if (pinspack == TM_I2C_PinsPack_2) {
binoit 0:3adb31fbd547 362 TM_GPIO_InitAlternate(GPIOF, GPIO_PIN_0 | GPIO_PIN_1, TM_GPIO_OType_OD, TM_GPIO_PuPd_UP, TM_GPIO_Speed_Medium, GPIO_AF_I2C2);
binoit 0:3adb31fbd547 363 }
binoit 0:3adb31fbd547 364 #endif
binoit 0:3adb31fbd547 365 #if defined(GPIOH)
binoit 0:3adb31fbd547 366 if (pinspack == TM_I2C_PinsPack_3) {
binoit 0:3adb31fbd547 367 TM_GPIO_InitAlternate(GPIOH, GPIO_PIN_4 | GPIO_PIN_5, TM_GPIO_OType_OD, TM_GPIO_PuPd_UP, TM_GPIO_Speed_Medium, GPIO_AF_I2C2);
binoit 0:3adb31fbd547 368 }
binoit 0:3adb31fbd547 369 #endif
binoit 0:3adb31fbd547 370 if (pinspack == TM_I2C_PinsPack_Custom) {
binoit 0:3adb31fbd547 371 /* Init custom pins, callback function */
binoit 0:3adb31fbd547 372 TM_I2C_InitCustomPinsCallback(I2C2, GPIO_AF_I2C2);
binoit 0:3adb31fbd547 373 }
binoit 0:3adb31fbd547 374 }
binoit 0:3adb31fbd547 375
binoit 0:3adb31fbd547 376 static void TM_I2C3_INT_InitPins(TM_I2C_PinsPack_t pinspack) {
binoit 0:3adb31fbd547 377 /* Init pins */
binoit 0:3adb31fbd547 378 #if defined(GPIOA) && defined(GPIOC)
binoit 0:3adb31fbd547 379 if (pinspack == TM_I2C_PinsPack_1) {
binoit 0:3adb31fbd547 380 TM_GPIO_InitAlternate(GPIOA, GPIO_PIN_8, TM_GPIO_OType_OD, TM_GPIO_PuPd_UP, TM_GPIO_Speed_Medium, GPIO_AF_I2C3);
binoit 0:3adb31fbd547 381 TM_GPIO_InitAlternate(GPIOC, GPIO_PIN_9, TM_GPIO_OType_OD, TM_GPIO_PuPd_UP, TM_GPIO_Speed_Medium, GPIO_AF_I2C3);
binoit 0:3adb31fbd547 382 }
binoit 0:3adb31fbd547 383 #endif
binoit 0:3adb31fbd547 384 #if defined(GPIOH)
binoit 0:3adb31fbd547 385 if (pinspack == TM_I2C_PinsPack_2) {
binoit 0:3adb31fbd547 386 TM_GPIO_InitAlternate(GPIOH, GPIO_PIN_7 | GPIO_PIN_8, TM_GPIO_OType_OD, TM_GPIO_PuPd_UP, TM_GPIO_Speed_Medium, GPIO_AF_I2C3);
binoit 0:3adb31fbd547 387 }
binoit 0:3adb31fbd547 388 #endif
binoit 0:3adb31fbd547 389 if (pinspack == TM_I2C_PinsPack_Custom) {
binoit 0:3adb31fbd547 390 /* Init custom pins, callback function */
binoit 0:3adb31fbd547 391 TM_I2C_InitCustomPinsCallback(I2C3, GPIO_AF_I2C3);
binoit 0:3adb31fbd547 392 }
binoit 0:3adb31fbd547 393 }