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Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

targets/TARGET_Maxim/TARGET_MAX32625/mxc/i2cs.c@1:f30bdcd2b33b, 2017-02-27 (annotated)

Committer:
jacobjohnson
Date:
Mon Feb 27 17:45:05 2017 +0000
Revision:
1:f30bdcd2b33b
Parent:
0:098463de4c5d 
changed the inputscale from 1 to 7 in analogin_api.c.  This will need to be changed later, and accessed from the main level, but for now this allows the  adc to read a value from 0 to 3.7V, instead of just up to 1V.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-onsemi 0:098463de4c5d 1 /**
group-onsemi 0:098463de4c5d 2 * @file i2cs.c
group-onsemi 0:098463de4c5d 3 * @brief This file contains the function implementations for the I2CS
group-onsemi 0:098463de4c5d 4 * (Inter-Integrated Circuit Slave) peripheral module.
group-onsemi 0:098463de4c5d 5 */
group-onsemi 0:098463de4c5d 6 /* ****************************************************************************
group-onsemi 0:098463de4c5d 7 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
group-onsemi 0:098463de4c5d 8 *
group-onsemi 0:098463de4c5d 9 * Permission is hereby granted, free of charge, to any person obtaining a
group-onsemi 0:098463de4c5d 10 * copy of this software and associated documentation files (the "Software"),
group-onsemi 0:098463de4c5d 11 * to deal in the Software without restriction, including without limitation
group-onsemi 0:098463de4c5d 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
group-onsemi 0:098463de4c5d 13 * and/or sell copies of the Software, and to permit persons to whom the
group-onsemi 0:098463de4c5d 14 * Software is furnished to do so, subject to the following conditions:
group-onsemi 0:098463de4c5d 15 *
group-onsemi 0:098463de4c5d 16 * The above copyright notice and this permission notice shall be included
group-onsemi 0:098463de4c5d 17 * in all copies or substantial portions of the Software.
group-onsemi 0:098463de4c5d 18 *
group-onsemi 0:098463de4c5d 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
group-onsemi 0:098463de4c5d 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
group-onsemi 0:098463de4c5d 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
group-onsemi 0:098463de4c5d 22 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
group-onsemi 0:098463de4c5d 23 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
group-onsemi 0:098463de4c5d 24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
group-onsemi 0:098463de4c5d 25 * OTHER DEALINGS IN THE SOFTWARE.
group-onsemi 0:098463de4c5d 26 *
group-onsemi 0:098463de4c5d 27 * Except as contained in this notice, the name of Maxim Integrated
group-onsemi 0:098463de4c5d 28 * Products, Inc. shall not be used except as stated in the Maxim Integrated
group-onsemi 0:098463de4c5d 29 * Products, Inc. Branding Policy.
group-onsemi 0:098463de4c5d 30 *
group-onsemi 0:098463de4c5d 31 * The mere transfer of this software does not imply any licenses
group-onsemi 0:098463de4c5d 32 * of trade secrets, proprietary technology, copyrights, patents,
group-onsemi 0:098463de4c5d 33 * trademarks, maskwork rights, or any other form of intellectual
group-onsemi 0:098463de4c5d 34 * property whatsoever. Maxim Integrated Products, Inc. retains all
group-onsemi 0:098463de4c5d 35 * ownership rights.
group-onsemi 0:098463de4c5d 36 *
group-onsemi 0:098463de4c5d 37 * $Date: 2016-08-15 20:05:48 -0500 (Mon, 15 Aug 2016) $
group-onsemi 0:098463de4c5d 38 * $Revision: 24086 $
group-onsemi 0:098463de4c5d 39 *
group-onsemi 0:098463de4c5d 40 *************************************************************************** */
group-onsemi 0:098463de4c5d 41
group-onsemi 0:098463de4c5d 42 /* **** Includes **** */
group-onsemi 0:098463de4c5d 43 #include <string.h>
group-onsemi 0:098463de4c5d 44 #include "mxc_assert.h"
group-onsemi 0:098463de4c5d 45 #include "mxc_errors.h"
group-onsemi 0:098463de4c5d 46 #include "mxc_sys.h"
group-onsemi 0:098463de4c5d 47 #include "i2cs.h"
group-onsemi 0:098463de4c5d 48
group-onsemi 0:098463de4c5d 49 /**
group-onsemi 0:098463de4c5d 50 * @ingroup i2cs
group-onsemi 0:098463de4c5d 51 * @{
group-onsemi 0:098463de4c5d 52 */
group-onsemi 0:098463de4c5d 53 /* **** Definitions **** */
group-onsemi 0:098463de4c5d 54
group-onsemi 0:098463de4c5d 55 /* **** Globals ***** */
group-onsemi 0:098463de4c5d 56
group-onsemi 0:098463de4c5d 57
group-onsemi 0:098463de4c5d 58 // No Doxygen documentation for the items between here and endcond.
group-onsemi 0:098463de4c5d 59 /* Clock divider lookup table */
group-onsemi 0:098463de4c5d 60 static const uint32_t clk_div_table[2][8] = {
group-onsemi 0:098463de4c5d 61 /* I2CS_SPEED_100KHZ */
group-onsemi 0:098463de4c5d 62 {
group-onsemi 0:098463de4c5d 63 // 12000000
group-onsemi 0:098463de4c5d 64 (6 << MXC_F_I2CS_CLK_DIV_FS_FILTER_CLOCK_DIV_POS),
group-onsemi 0:098463de4c5d 65 // 24000000
group-onsemi 0:098463de4c5d 66 (12 << MXC_F_I2CS_CLK_DIV_FS_FILTER_CLOCK_DIV_POS),
group-onsemi 0:098463de4c5d 67 // 36000000 NOT SUPPORTED
group-onsemi 0:098463de4c5d 68 0,
group-onsemi 0:098463de4c5d 69 // 48000000
group-onsemi 0:098463de4c5d 70 (24 << MXC_F_I2CS_CLK_DIV_FS_FILTER_CLOCK_DIV_POS),
group-onsemi 0:098463de4c5d 71 // 60000000 NOT SUPPORTED
group-onsemi 0:098463de4c5d 72 0,
group-onsemi 0:098463de4c5d 73 // 72000000 NOT SUPPORTED
group-onsemi 0:098463de4c5d 74 0,
group-onsemi 0:098463de4c5d 75 // 84000000 NOT SUPPORTED
group-onsemi 0:098463de4c5d 76 0,
group-onsemi 0:098463de4c5d 77 // 96000000
group-onsemi 0:098463de4c5d 78 (48 << MXC_F_I2CS_CLK_DIV_FS_FILTER_CLOCK_DIV_POS)
group-onsemi 0:098463de4c5d 79 },
group-onsemi 0:098463de4c5d 80 /* I2CS_SPEED_400KHZ */
group-onsemi 0:098463de4c5d 81 {
group-onsemi 0:098463de4c5d 82 // 12000000
group-onsemi 0:098463de4c5d 83 (2 << MXC_F_I2CS_CLK_DIV_FS_FILTER_CLOCK_DIV_POS),
group-onsemi 0:098463de4c5d 84 // 24000000
group-onsemi 0:098463de4c5d 85 (3 << MXC_F_I2CS_CLK_DIV_FS_FILTER_CLOCK_DIV_POS),
group-onsemi 0:098463de4c5d 86 // 36000000 NOT SUPPORTED
group-onsemi 0:098463de4c5d 87 0,
group-onsemi 0:098463de4c5d 88 // 48000000
group-onsemi 0:098463de4c5d 89 (6 << MXC_F_I2CS_CLK_DIV_FS_FILTER_CLOCK_DIV_POS),
group-onsemi 0:098463de4c5d 90 // 60000000 NOT SUPPORTED
group-onsemi 0:098463de4c5d 91 0,
group-onsemi 0:098463de4c5d 92 // 72000000 NOT SUPPORTED
group-onsemi 0:098463de4c5d 93 0,
group-onsemi 0:098463de4c5d 94 // 84000000 NOT SUPPORTED
group-onsemi 0:098463de4c5d 95 0,
group-onsemi 0:098463de4c5d 96 // 96000000
group-onsemi 0:098463de4c5d 97 (12 << MXC_F_I2CS_CLK_DIV_FS_FILTER_CLOCK_DIV_POS)
group-onsemi 0:098463de4c5d 98 },
group-onsemi 0:098463de4c5d 99 };
group-onsemi 0:098463de4c5d 100
group-onsemi 0:098463de4c5d 101
group-onsemi 0:098463de4c5d 102 static void (*callbacks[MXC_CFG_I2CS_INSTANCES][MXC_CFG_I2CS_BUFFER_SIZE])(uint8_t);
group-onsemi 0:098463de4c5d 103
group-onsemi 0:098463de4c5d 104 /* **** Functions **** */
group-onsemi 0:098463de4c5d 105
group-onsemi 0:098463de4c5d 106 /* ************************************************************************* */
group-onsemi 0:098463de4c5d 107 int I2CS_Init(mxc_i2cs_regs_t *i2cs, const sys_cfg_i2cs_t *sys_cfg, i2cs_speed_t speed,
group-onsemi 0:098463de4c5d 108 uint16_t address, i2cs_addr_t addr_len)
group-onsemi 0:098463de4c5d 109 {
group-onsemi 0:098463de4c5d 110 int err, i, i2cs_index;
group-onsemi 0:098463de4c5d 111
group-onsemi 0:098463de4c5d 112 i2cs_index = MXC_I2CS_GET_IDX(i2cs);
group-onsemi 0:098463de4c5d 113 MXC_ASSERT(i2cs_index >= 0);
group-onsemi 0:098463de4c5d 114
group-onsemi 0:098463de4c5d 115 // Set system level configurations
group-onsemi 0:098463de4c5d 116 if ((err = SYS_I2CS_Init(i2cs, sys_cfg)) != E_NO_ERROR) {
group-onsemi 0:098463de4c5d 117 return err;
group-onsemi 0:098463de4c5d 118 }
group-onsemi 0:098463de4c5d 119
group-onsemi 0:098463de4c5d 120 // Compute clock array index
group-onsemi 0:098463de4c5d 121 int clki = ((SYS_I2CS_GetFreq(i2cs) / 12000000) - 1);
group-onsemi 0:098463de4c5d 122
group-onsemi 0:098463de4c5d 123 // Get clock divider settings from lookup table
group-onsemi 0:098463de4c5d 124 if ((speed == I2CS_SPEED_100KHZ) && (clk_div_table[I2CS_SPEED_100KHZ][clki] > 0)) {
group-onsemi 0:098463de4c5d 125 i2cs->clk_div = clk_div_table[I2CS_SPEED_100KHZ][clki];
group-onsemi 0:098463de4c5d 126 } else if ((speed == I2CS_SPEED_400KHZ) && (clk_div_table[I2CS_SPEED_400KHZ][clki] > 0)) {
group-onsemi 0:098463de4c5d 127 i2cs->clk_div = clk_div_table[I2CS_SPEED_400KHZ][clki];
group-onsemi 0:098463de4c5d 128 } else {
group-onsemi 0:098463de4c5d 129 MXC_ASSERT_FAIL();
group-onsemi 0:098463de4c5d 130 }
group-onsemi 0:098463de4c5d 131
group-onsemi 0:098463de4c5d 132 // Clear the interrupt callbacks
group-onsemi 0:098463de4c5d 133 for(i = 0; i < MXC_CFG_I2CS_BUFFER_SIZE; i++) {
group-onsemi 0:098463de4c5d 134 callbacks[i2cs_index][i] = NULL;
group-onsemi 0:098463de4c5d 135 }
group-onsemi 0:098463de4c5d 136
group-onsemi 0:098463de4c5d 137 // Reset module
group-onsemi 0:098463de4c5d 138 i2cs->dev_id = MXC_F_I2CS_DEV_ID_SLAVE_RESET;
group-onsemi 0:098463de4c5d 139 i2cs->dev_id = ((((address >> 0) << MXC_F_I2CS_DEV_ID_SLAVE_DEV_ID_POS)
group-onsemi 0:098463de4c5d 140 & MXC_F_I2CS_DEV_ID_SLAVE_DEV_ID) | addr_len);
group-onsemi 0:098463de4c5d 141
group-onsemi 0:098463de4c5d 142 return E_NO_ERROR;
group-onsemi 0:098463de4c5d 143 }
group-onsemi 0:098463de4c5d 144
group-onsemi 0:098463de4c5d 145 /* ************************************************************************* */
group-onsemi 0:098463de4c5d 146 int I2CS_Shutdown(mxc_i2cs_regs_t *i2cs)
group-onsemi 0:098463de4c5d 147 {
group-onsemi 0:098463de4c5d 148 int err;
group-onsemi 0:098463de4c5d 149
group-onsemi 0:098463de4c5d 150 // Disable and clear interrupts
group-onsemi 0:098463de4c5d 151 i2cs->inten = 0;
group-onsemi 0:098463de4c5d 152 i2cs->intfl = i2cs->intfl;
group-onsemi 0:098463de4c5d 153
group-onsemi 0:098463de4c5d 154 // clears system level configurations
group-onsemi 0:098463de4c5d 155 if ((err = SYS_I2CS_Shutdown(i2cs)) != E_NO_ERROR) {
group-onsemi 0:098463de4c5d 156 return err;
group-onsemi 0:098463de4c5d 157 }
group-onsemi 0:098463de4c5d 158
group-onsemi 0:098463de4c5d 159 return E_NO_ERROR;
group-onsemi 0:098463de4c5d 160 }
group-onsemi 0:098463de4c5d 161
group-onsemi 0:098463de4c5d 162 /* ************************************************************************* */
group-onsemi 0:098463de4c5d 163 void I2CS_Handler(mxc_i2cs_regs_t *i2cs)
group-onsemi 0:098463de4c5d 164 {
group-onsemi 0:098463de4c5d 165 uint32_t intfl;
group-onsemi 0:098463de4c5d 166 uint8_t i;
group-onsemi 0:098463de4c5d 167 int i2cs_index = MXC_I2CS_GET_IDX(i2cs);
group-onsemi 0:098463de4c5d 168
group-onsemi 0:098463de4c5d 169 // Save and clear the interrupt flags
group-onsemi 0:098463de4c5d 170 intfl = i2cs->intfl;
group-onsemi 0:098463de4c5d 171 i2cs->intfl = intfl;
group-onsemi 0:098463de4c5d 172
group-onsemi 0:098463de4c5d 173 // Process each interrupt
group-onsemi 0:098463de4c5d 174 for(i = 0; i < 32; i++) {
group-onsemi 0:098463de4c5d 175 if(intfl & (0x1 << i)) {
group-onsemi 0:098463de4c5d 176 if(callbacks[i2cs_index][i] != NULL) {
group-onsemi 0:098463de4c5d 177 callbacks[i2cs_index][i](i);
group-onsemi 0:098463de4c5d 178 }
group-onsemi 0:098463de4c5d 179 }
group-onsemi 0:098463de4c5d 180 }
group-onsemi 0:098463de4c5d 181
group-onsemi 0:098463de4c5d 182 }
group-onsemi 0:098463de4c5d 183
group-onsemi 0:098463de4c5d 184 /* ************************************************************************* */
group-onsemi 0:098463de4c5d 185 void I2CS_RegisterCallback(mxc_i2cs_regs_t *i2cs, uint8_t addr, i2cs_callback_fn callback)
group-onsemi 0:098463de4c5d 186 {
group-onsemi 0:098463de4c5d 187 int i2cs_index = MXC_I2CS_GET_IDX(i2cs);
group-onsemi 0:098463de4c5d 188
group-onsemi 0:098463de4c5d 189 // Make sure we don't overflow
group-onsemi 0:098463de4c5d 190 MXC_ASSERT(addr < MXC_CFG_I2CS_BUFFER_SIZE);
group-onsemi 0:098463de4c5d 191
group-onsemi 0:098463de4c5d 192 if(callback != NULL) {
group-onsemi 0:098463de4c5d 193 // Save the callback address
group-onsemi 0:098463de4c5d 194 callbacks[i2cs_index][addr] = callback;
group-onsemi 0:098463de4c5d 195
group-onsemi 0:098463de4c5d 196 // Clear and Enable the interrupt for the given byte
group-onsemi 0:098463de4c5d 197 i2cs->intfl = (0x1 << addr);
group-onsemi 0:098463de4c5d 198 i2cs->inten |= (0x1 << addr);
group-onsemi 0:098463de4c5d 199 } else {
group-onsemi 0:098463de4c5d 200 // Disable and clear the interrupt
group-onsemi 0:098463de4c5d 201 i2cs->inten &= ~(0x1 << addr);
group-onsemi 0:098463de4c5d 202 i2cs->intfl = (0x1 << addr);
group-onsemi 0:098463de4c5d 203
group-onsemi 0:098463de4c5d 204 // Clear the callback address
group-onsemi 0:098463de4c5d 205 callbacks[i2cs_index][addr] = NULL;
group-onsemi 0:098463de4c5d 206 }
group-onsemi 0:098463de4c5d 207 }
group-onsemi 0:098463de4c5d 208
group-onsemi 0:098463de4c5d 209 /**@} end of group i2cs*/