Fawwaz Nadzmy / mbed-STM

mbed library sources. Supersedes mbed-src.

Fork of mbed-dev by mbed official

targets/TARGET_STM/TARGET_STM32F0/can_api.c@153:9398a535854b, 2016-12-22 (annotated)

Committer:
fwndz
Date:
Thu Dec 22 05:12:40 2016 +0000
Revision:
153:9398a535854b
Parent:
150:02e0a0aed4ec 
device target maximize

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 138:881eab8cab64 1 /* mbed Microcontroller Library
mbed_official 138:881eab8cab64 2 * Copyright (c) 2006-2016 ARM Limited
mbed_official 138:881eab8cab64 3 *
mbed_official 138:881eab8cab64 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 138:881eab8cab64 5 * you may not use this file except in compliance with the License.
mbed_official 138:881eab8cab64 6 * You may obtain a copy of the License at
mbed_official 138:881eab8cab64 7 *
mbed_official 138:881eab8cab64 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 138:881eab8cab64 9 *
mbed_official 138:881eab8cab64 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 138:881eab8cab64 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 138:881eab8cab64 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 138:881eab8cab64 13 * See the License for the specific language governing permissions and
mbed_official 138:881eab8cab64 14 * limitations under the License.
mbed_official 138:881eab8cab64 15 */
mbed_official 138:881eab8cab64 16 #include "can_api.h"
mbed_official 138:881eab8cab64 17
mbed_official 138:881eab8cab64 18 #if DEVICE_CAN
mbed_official 138:881eab8cab64 19
mbed_official 138:881eab8cab64 20 #include "cmsis.h"
mbed_official 138:881eab8cab64 21 #include "pinmap.h"
mbed_official 138:881eab8cab64 22 #include "PeripheralPins.h"
mbed_official 138:881eab8cab64 23 #include "mbed_error.h"
mbed_official 138:881eab8cab64 24 #include <math.h>
mbed_official 138:881eab8cab64 25 #include <string.h>
mbed_official 138:881eab8cab64 26
mbed_official 138:881eab8cab64 27 #define CAN_NUM 1
mbed_official 138:881eab8cab64 28 static CAN_HandleTypeDef CanHandle;
mbed_official 138:881eab8cab64 29 static uint32_t can_irq_ids[CAN_NUM] = {0};
mbed_official 138:881eab8cab64 30 static can_irq_handler irq_handler;
mbed_official 138:881eab8cab64 31
mbed_official 138:881eab8cab64 32 void can_init(can_t *obj, PinName rd, PinName td)
mbed_official 138:881eab8cab64 33 {
mbed_official 138:881eab8cab64 34 CANName can_rd = (CANName)pinmap_peripheral(rd, PinMap_CAN_RD);
mbed_official 138:881eab8cab64 35 CANName can_td = (CANName)pinmap_peripheral(td, PinMap_CAN_TD);
mbed_official 138:881eab8cab64 36 obj->can = (CANName)pinmap_merge(can_rd, can_td);
mbed_official 138:881eab8cab64 37 MBED_ASSERT((int)obj->can != NC);
mbed_official 138:881eab8cab64 38
<> 150:02e0a0aed4ec 39 if (obj->can == CAN_1) {
mbed_official 138:881eab8cab64 40 __HAL_RCC_CAN1_CLK_ENABLE();
mbed_official 138:881eab8cab64 41 obj->index = 0;
mbed_official 138:881eab8cab64 42 }
mbed_official 138:881eab8cab64 43
mbed_official 138:881eab8cab64 44 // Configure the CAN pins
mbed_official 138:881eab8cab64 45 pinmap_pinout(rd, PinMap_CAN_RD);
mbed_official 138:881eab8cab64 46 pinmap_pinout(td, PinMap_CAN_TD);
mbed_official 138:881eab8cab64 47 if (rd != NC) {
mbed_official 138:881eab8cab64 48 pin_mode(rd, PullUp);
mbed_official 138:881eab8cab64 49 }
mbed_official 138:881eab8cab64 50 if (td != NC) {
mbed_official 138:881eab8cab64 51 pin_mode(td, PullUp);
mbed_official 138:881eab8cab64 52 }
mbed_official 138:881eab8cab64 53
mbed_official 138:881eab8cab64 54 CanHandle.Instance = (CAN_TypeDef *)(obj->can);
mbed_official 138:881eab8cab64 55
mbed_official 138:881eab8cab64 56 CanHandle.Init.TTCM = DISABLE;
mbed_official 138:881eab8cab64 57 CanHandle.Init.ABOM = DISABLE;
mbed_official 138:881eab8cab64 58 CanHandle.Init.AWUM = DISABLE;
mbed_official 138:881eab8cab64 59 CanHandle.Init.NART = DISABLE;
mbed_official 138:881eab8cab64 60 CanHandle.Init.RFLM = DISABLE;
mbed_official 138:881eab8cab64 61 CanHandle.Init.TXFP = DISABLE;
mbed_official 138:881eab8cab64 62 CanHandle.Init.Mode = CAN_MODE_NORMAL;
mbed_official 138:881eab8cab64 63 CanHandle.Init.SJW = CAN_SJW_1TQ;
mbed_official 138:881eab8cab64 64 CanHandle.Init.BS1 = CAN_BS1_6TQ;
mbed_official 138:881eab8cab64 65 CanHandle.Init.BS2 = CAN_BS2_8TQ;
mbed_official 138:881eab8cab64 66 CanHandle.Init.Prescaler = 2;
mbed_official 138:881eab8cab64 67
mbed_official 138:881eab8cab64 68 if (HAL_CAN_Init(&CanHandle) != HAL_OK) {
mbed_official 138:881eab8cab64 69 error("Cannot initialize CAN");
mbed_official 138:881eab8cab64 70 }
mbed_official 138:881eab8cab64 71 // Set initial CAN frequency to 100kb/s
mbed_official 138:881eab8cab64 72 can_frequency(obj, 100000);
mbed_official 138:881eab8cab64 73
mbed_official 138:881eab8cab64 74 can_filter(obj, 0, 0, CANStandard, 0);
mbed_official 138:881eab8cab64 75 }
mbed_official 138:881eab8cab64 76
mbed_official 138:881eab8cab64 77 void can_irq_init(can_t *obj, can_irq_handler handler, uint32_t id)
mbed_official 138:881eab8cab64 78 {
mbed_official 138:881eab8cab64 79 irq_handler = handler;
mbed_official 138:881eab8cab64 80 can_irq_ids[obj->index] = id;
mbed_official 138:881eab8cab64 81 }
mbed_official 138:881eab8cab64 82
mbed_official 138:881eab8cab64 83 void can_irq_free(can_t *obj)
mbed_official 138:881eab8cab64 84 {
mbed_official 138:881eab8cab64 85 CAN_TypeDef *can = (CAN_TypeDef *)(obj->can);
mbed_official 138:881eab8cab64 86
mbed_official 138:881eab8cab64 87 can->IER &= ~(CAN_IT_FMP0 | CAN_IT_FMP1 | CAN_IT_TME | \
mbed_official 138:881eab8cab64 88 CAN_IT_ERR | CAN_IT_EPV | CAN_IT_BOF);
mbed_official 138:881eab8cab64 89 can_irq_ids[obj->can] = 0;
mbed_official 138:881eab8cab64 90 }
mbed_official 138:881eab8cab64 91
mbed_official 138:881eab8cab64 92 void can_free(can_t *obj)
mbed_official 138:881eab8cab64 93 {
mbed_official 138:881eab8cab64 94 // Reset CAN and disable clock
mbed_official 138:881eab8cab64 95 if (obj->can == CAN_1) {
mbed_official 138:881eab8cab64 96 __HAL_RCC_CAN1_FORCE_RESET();
mbed_official 138:881eab8cab64 97 __HAL_RCC_CAN1_RELEASE_RESET();
mbed_official 138:881eab8cab64 98 __HAL_RCC_CAN1_CLK_DISABLE();
mbed_official 138:881eab8cab64 99 }
mbed_official 138:881eab8cab64 100 }
mbed_official 138:881eab8cab64 101
mbed_official 138:881eab8cab64 102 // The following table is used to program bit_timing. It is an adjustment of the sample
mbed_official 138:881eab8cab64 103 // point by synchronizing on the start-bit edge and resynchronizing on the following edges.
mbed_official 138:881eab8cab64 104 // This table has the sampling points as close to 75% as possible (most commonly used).
mbed_official 138:881eab8cab64 105 // The first value is TSEG1, the second TSEG2.
mbed_official 138:881eab8cab64 106 static const int timing_pts[23][2] = {
mbed_official 138:881eab8cab64 107 {0x0, 0x0}, // 2, 50%
mbed_official 138:881eab8cab64 108 {0x1, 0x0}, // 3, 67%
mbed_official 138:881eab8cab64 109 {0x2, 0x0}, // 4, 75%
mbed_official 138:881eab8cab64 110 {0x3, 0x0}, // 5, 80%
mbed_official 138:881eab8cab64 111 {0x3, 0x1}, // 6, 67%
mbed_official 138:881eab8cab64 112 {0x4, 0x1}, // 7, 71%
mbed_official 138:881eab8cab64 113 {0x5, 0x1}, // 8, 75%
mbed_official 138:881eab8cab64 114 {0x6, 0x1}, // 9, 78%
mbed_official 138:881eab8cab64 115 {0x6, 0x2}, // 10, 70%
mbed_official 138:881eab8cab64 116 {0x7, 0x2}, // 11, 73%
mbed_official 138:881eab8cab64 117 {0x8, 0x2}, // 12, 75%
mbed_official 138:881eab8cab64 118 {0x9, 0x2}, // 13, 77%
mbed_official 138:881eab8cab64 119 {0x9, 0x3}, // 14, 71%
mbed_official 138:881eab8cab64 120 {0xA, 0x3}, // 15, 73%
mbed_official 138:881eab8cab64 121 {0xB, 0x3}, // 16, 75%
mbed_official 138:881eab8cab64 122 {0xC, 0x3}, // 17, 76%
mbed_official 138:881eab8cab64 123 {0xD, 0x3}, // 18, 78%
mbed_official 138:881eab8cab64 124 {0xD, 0x4}, // 19, 74%
mbed_official 138:881eab8cab64 125 {0xE, 0x4}, // 20, 75%
mbed_official 138:881eab8cab64 126 {0xF, 0x4}, // 21, 76%
mbed_official 138:881eab8cab64 127 {0xF, 0x5}, // 22, 73%
mbed_official 138:881eab8cab64 128 {0xF, 0x6}, // 23, 70%
mbed_official 138:881eab8cab64 129 {0xF, 0x7}, // 24, 67%
mbed_official 138:881eab8cab64 130 };
mbed_official 138:881eab8cab64 131
mbed_official 138:881eab8cab64 132 static unsigned int can_speed(unsigned int pclk, unsigned int cclk, unsigned char psjw)
mbed_official 138:881eab8cab64 133 {
mbed_official 138:881eab8cab64 134 uint32_t btr;
mbed_official 138:881eab8cab64 135 uint16_t brp = 0;
mbed_official 138:881eab8cab64 136 uint32_t calcbit;
mbed_official 138:881eab8cab64 137 uint32_t bitwidth;
mbed_official 138:881eab8cab64 138 int hit = 0;
mbed_official 138:881eab8cab64 139 int bits;
mbed_official 138:881eab8cab64 140
mbed_official 138:881eab8cab64 141 bitwidth = (pclk / cclk);
mbed_official 138:881eab8cab64 142
mbed_official 138:881eab8cab64 143 brp = bitwidth / 0x18;
mbed_official 138:881eab8cab64 144 while ((!hit) && (brp < bitwidth / 4)) {
mbed_official 138:881eab8cab64 145 brp++;
mbed_official 138:881eab8cab64 146 for (bits = 22; bits > 0; bits--) {
mbed_official 138:881eab8cab64 147 calcbit = (bits + 3) * (brp + 1);
mbed_official 138:881eab8cab64 148 if (calcbit == bitwidth) {
mbed_official 138:881eab8cab64 149 hit = 1;
mbed_official 138:881eab8cab64 150 break;
mbed_official 138:881eab8cab64 151 }
mbed_official 138:881eab8cab64 152 }
mbed_official 138:881eab8cab64 153 }
mbed_official 138:881eab8cab64 154
mbed_official 138:881eab8cab64 155 if (hit) {
mbed_official 138:881eab8cab64 156 btr = ((timing_pts[bits][1] << 20) & 0x00700000)
mbed_official 138:881eab8cab64 157 | ((timing_pts[bits][0] << 16) & 0x000F0000)
mbed_official 138:881eab8cab64 158 | ((psjw << 24) & 0x0000C000)
mbed_official 138:881eab8cab64 159 | ((brp << 0) & 0x000003FF);
mbed_official 138:881eab8cab64 160 } else {
mbed_official 138:881eab8cab64 161 btr = 0xFFFFFFFF;
mbed_official 138:881eab8cab64 162 }
mbed_official 138:881eab8cab64 163
mbed_official 138:881eab8cab64 164 return btr;
mbed_official 138:881eab8cab64 165
mbed_official 138:881eab8cab64 166 }
mbed_official 138:881eab8cab64 167
mbed_official 138:881eab8cab64 168 int can_frequency(can_t *obj, int f)
mbed_official 138:881eab8cab64 169 {
mbed_official 138:881eab8cab64 170 int pclk = HAL_RCC_GetPCLK1Freq();
mbed_official 138:881eab8cab64 171 int btr = can_speed(pclk, (unsigned int)f, 1);
mbed_official 138:881eab8cab64 172 CAN_TypeDef *can = (CAN_TypeDef *)(obj->can);
mbed_official 138:881eab8cab64 173
mbed_official 138:881eab8cab64 174 if (btr > 0) {
mbed_official 138:881eab8cab64 175 can->MCR |= CAN_MCR_INRQ ;
<> 150:02e0a0aed4ec 176 while ((can->MSR & CAN_MSR_INAK) != CAN_MSR_INAK) {
mbed_official 138:881eab8cab64 177 }
mbed_official 138:881eab8cab64 178 can->BTR = btr;
mbed_official 138:881eab8cab64 179 can->MCR &= ~(uint32_t)CAN_MCR_INRQ;
<> 150:02e0a0aed4ec 180 while ((can->MSR & CAN_MSR_INAK) == CAN_MSR_INAK) {
mbed_official 138:881eab8cab64 181 }
mbed_official 138:881eab8cab64 182 return 1;
mbed_official 138:881eab8cab64 183 } else {
mbed_official 138:881eab8cab64 184 return 0;
mbed_official 138:881eab8cab64 185 }
mbed_official 138:881eab8cab64 186 }
mbed_official 138:881eab8cab64 187
mbed_official 138:881eab8cab64 188 int can_write(can_t *obj, CAN_Message msg, int cc)
mbed_official 138:881eab8cab64 189 {
mbed_official 138:881eab8cab64 190 uint32_t transmitmailbox = 5;
mbed_official 138:881eab8cab64 191 CAN_TypeDef *can = (CAN_TypeDef *)(obj->can);
mbed_official 138:881eab8cab64 192
mbed_official 138:881eab8cab64 193 /* Select one empty transmit mailbox */
mbed_official 138:881eab8cab64 194 if ((can->TSR&CAN_TSR_TME0) == CAN_TSR_TME0) {
mbed_official 138:881eab8cab64 195 transmitmailbox = 0;
mbed_official 138:881eab8cab64 196 } else if ((can->TSR&CAN_TSR_TME1) == CAN_TSR_TME1) {
mbed_official 138:881eab8cab64 197 transmitmailbox = 1;
mbed_official 138:881eab8cab64 198 } else if ((can->TSR&CAN_TSR_TME2) == CAN_TSR_TME2) {
mbed_official 138:881eab8cab64 199 transmitmailbox = 2;
mbed_official 138:881eab8cab64 200 } else {
mbed_official 138:881eab8cab64 201 transmitmailbox = CAN_TXSTATUS_NOMAILBOX;
mbed_official 138:881eab8cab64 202 }
mbed_official 138:881eab8cab64 203
mbed_official 138:881eab8cab64 204 if (transmitmailbox != CAN_TXSTATUS_NOMAILBOX) {
mbed_official 138:881eab8cab64 205 can->sTxMailBox[transmitmailbox].TIR &= CAN_TI0R_TXRQ;
<> 150:02e0a0aed4ec 206 if (!(msg.format)) {
mbed_official 138:881eab8cab64 207 can->sTxMailBox[transmitmailbox].TIR |= ((msg.id << 21) | msg.type);
<> 150:02e0a0aed4ec 208 } else {
mbed_official 138:881eab8cab64 209 can->sTxMailBox[transmitmailbox].TIR |= ((msg.id << 3) | CAN_ID_EXT | msg.type);
mbed_official 138:881eab8cab64 210 }
mbed_official 138:881eab8cab64 211
mbed_official 138:881eab8cab64 212 /* Set up the DLC */
mbed_official 138:881eab8cab64 213 can->sTxMailBox[transmitmailbox].TDTR &= (uint32_t)0xFFFFFFF0;
mbed_official 138:881eab8cab64 214 can->sTxMailBox[transmitmailbox].TDTR |= (msg.len & (uint8_t)0x0000000F);
mbed_official 138:881eab8cab64 215
mbed_official 138:881eab8cab64 216 /* Set up the data field */
mbed_official 138:881eab8cab64 217 can->sTxMailBox[transmitmailbox].TDLR = (((uint32_t)msg.data[3] << 24) |
mbed_official 138:881eab8cab64 218 ((uint32_t)msg.data[2] << 16) |
mbed_official 138:881eab8cab64 219 ((uint32_t)msg.data[1] << 8) |
mbed_official 138:881eab8cab64 220 ((uint32_t)msg.data[0]));
mbed_official 138:881eab8cab64 221 can->sTxMailBox[transmitmailbox].TDHR = (((uint32_t)msg.data[7] << 24) |
mbed_official 138:881eab8cab64 222 ((uint32_t)msg.data[6] << 16) |
mbed_official 138:881eab8cab64 223 ((uint32_t)msg.data[5] << 8) |
mbed_official 138:881eab8cab64 224 ((uint32_t)msg.data[4]));
mbed_official 138:881eab8cab64 225 /* Request transmission */
mbed_official 138:881eab8cab64 226 can->sTxMailBox[transmitmailbox].TIR |= CAN_TI0R_TXRQ;
mbed_official 138:881eab8cab64 227 }
mbed_official 138:881eab8cab64 228
mbed_official 138:881eab8cab64 229 return 1;
mbed_official 138:881eab8cab64 230 }
mbed_official 138:881eab8cab64 231
mbed_official 138:881eab8cab64 232 int can_read(can_t *obj, CAN_Message *msg, int handle)
mbed_official 138:881eab8cab64 233 {
mbed_official 138:881eab8cab64 234 //handle is the FIFO number
mbed_official 138:881eab8cab64 235
mbed_official 138:881eab8cab64 236 CAN_TypeDef *can = (CAN_TypeDef *)(obj->can);
mbed_official 138:881eab8cab64 237
mbed_official 138:881eab8cab64 238 /* Get the Id */
mbed_official 138:881eab8cab64 239 msg->format = (CANFormat)((uint8_t)0x04 & can->sFIFOMailBox[handle].RIR);
mbed_official 138:881eab8cab64 240 if (!msg->format) {
mbed_official 138:881eab8cab64 241 msg->id = (uint32_t)0x000007FF & (can->sFIFOMailBox[handle].RIR >> 21);
mbed_official 138:881eab8cab64 242 } else {
mbed_official 138:881eab8cab64 243 msg->id = (uint32_t)0x1FFFFFFF & (can->sFIFOMailBox[handle].RIR >> 3);
mbed_official 138:881eab8cab64 244 }
mbed_official 138:881eab8cab64 245
mbed_official 138:881eab8cab64 246 msg->type = (CANType)((uint8_t)0x02 & can->sFIFOMailBox[handle].RIR);
mbed_official 138:881eab8cab64 247 /* Get the DLC */
mbed_official 138:881eab8cab64 248 msg->len = (uint8_t)0x0F & can->sFIFOMailBox[handle].RDTR;
mbed_official 138:881eab8cab64 249 // /* Get the FMI */
mbed_official 138:881eab8cab64 250 // msg->FMI = (uint8_t)0xFF & (can->sFIFOMailBox[handle].RDTR >> 8);
mbed_official 138:881eab8cab64 251 /* Get the data field */
mbed_official 138:881eab8cab64 252 msg->data[0] = (uint8_t)0xFF & can->sFIFOMailBox[handle].RDLR;
mbed_official 138:881eab8cab64 253 msg->data[1] = (uint8_t)0xFF & (can->sFIFOMailBox[handle].RDLR >> 8);
mbed_official 138:881eab8cab64 254 msg->data[2] = (uint8_t)0xFF & (can->sFIFOMailBox[handle].RDLR >> 16);
mbed_official 138:881eab8cab64 255 msg->data[3] = (uint8_t)0xFF & (can->sFIFOMailBox[handle].RDLR >> 24);
mbed_official 138:881eab8cab64 256 msg->data[4] = (uint8_t)0xFF & can->sFIFOMailBox[handle].RDHR;
mbed_official 138:881eab8cab64 257 msg->data[5] = (uint8_t)0xFF & (can->sFIFOMailBox[handle].RDHR >> 8);
mbed_official 138:881eab8cab64 258 msg->data[6] = (uint8_t)0xFF & (can->sFIFOMailBox[handle].RDHR >> 16);
mbed_official 138:881eab8cab64 259 msg->data[7] = (uint8_t)0xFF & (can->sFIFOMailBox[handle].RDHR >> 24);
mbed_official 138:881eab8cab64 260
mbed_official 138:881eab8cab64 261 /* Release the FIFO */
<> 150:02e0a0aed4ec 262 if (handle == CAN_FIFO0) {
mbed_official 138:881eab8cab64 263 /* Release FIFO0 */
mbed_official 138:881eab8cab64 264 can->RF0R = CAN_RF0R_RFOM0;
mbed_official 138:881eab8cab64 265 } else { /* FIFONumber == CAN_FIFO1 */
mbed_official 138:881eab8cab64 266 /* Release FIFO1 */
mbed_official 138:881eab8cab64 267 can->RF1R = CAN_RF1R_RFOM1;
mbed_official 138:881eab8cab64 268 }
mbed_official 138:881eab8cab64 269
mbed_official 138:881eab8cab64 270 return 1;
mbed_official 138:881eab8cab64 271 }
mbed_official 138:881eab8cab64 272
mbed_official 138:881eab8cab64 273 void can_reset(can_t *obj)
mbed_official 138:881eab8cab64 274 {
mbed_official 138:881eab8cab64 275 CAN_TypeDef *can = (CAN_TypeDef *)(obj->can);
mbed_official 138:881eab8cab64 276
mbed_official 138:881eab8cab64 277 can->MCR |= CAN_MCR_RESET;
mbed_official 138:881eab8cab64 278 can->ESR = 0x0;
mbed_official 138:881eab8cab64 279 }
mbed_official 138:881eab8cab64 280
mbed_official 138:881eab8cab64 281 unsigned char can_rderror(can_t *obj)
mbed_official 138:881eab8cab64 282 {
mbed_official 138:881eab8cab64 283 CAN_TypeDef *can = (CAN_TypeDef *)(obj->can);
mbed_official 138:881eab8cab64 284 return (can->ESR >> 24) & 0xFF;
mbed_official 138:881eab8cab64 285 }
mbed_official 138:881eab8cab64 286
mbed_official 138:881eab8cab64 287 unsigned char can_tderror(can_t *obj)
mbed_official 138:881eab8cab64 288 {
mbed_official 138:881eab8cab64 289 CAN_TypeDef *can = (CAN_TypeDef *)(obj->can);
mbed_official 138:881eab8cab64 290 return (can->ESR >> 16) & 0xFF;
mbed_official 138:881eab8cab64 291 }
mbed_official 138:881eab8cab64 292
mbed_official 138:881eab8cab64 293 void can_monitor(can_t *obj, int silent)
mbed_official 138:881eab8cab64 294 {
mbed_official 138:881eab8cab64 295 CAN_TypeDef *can = (CAN_TypeDef *)(obj->can);
mbed_official 138:881eab8cab64 296
mbed_official 138:881eab8cab64 297 can->MCR |= CAN_MCR_INRQ ;
mbed_official 138:881eab8cab64 298 while((can->MSR & CAN_MSR_INAK) != CAN_MSR_INAK) {
mbed_official 138:881eab8cab64 299 }
mbed_official 138:881eab8cab64 300 if (silent) {
mbed_official 138:881eab8cab64 301 can->BTR |= ((uint32_t)1 << 31);
mbed_official 138:881eab8cab64 302 } else {
mbed_official 138:881eab8cab64 303 can->BTR &= ~((uint32_t)1 << 31);
mbed_official 138:881eab8cab64 304 }
mbed_official 138:881eab8cab64 305 can->MCR &= ~(uint32_t)CAN_MCR_INRQ;
mbed_official 138:881eab8cab64 306 while((can->MSR & CAN_MSR_INAK) == CAN_MSR_INAK) {
mbed_official 138:881eab8cab64 307 }
mbed_official 138:881eab8cab64 308 }
mbed_official 138:881eab8cab64 309
mbed_official 138:881eab8cab64 310 int can_mode(can_t *obj, CanMode mode)
mbed_official 138:881eab8cab64 311 {
mbed_official 138:881eab8cab64 312 int success = 0;
mbed_official 138:881eab8cab64 313 CAN_TypeDef *can = (CAN_TypeDef *)(obj->can);
mbed_official 138:881eab8cab64 314 can->MCR |= CAN_MCR_INRQ ;
<> 150:02e0a0aed4ec 315 while ((can->MSR & CAN_MSR_INAK) != CAN_MSR_INAK) {
mbed_official 138:881eab8cab64 316 }
mbed_official 138:881eab8cab64 317 switch (mode) {
mbed_official 138:881eab8cab64 318 case MODE_NORMAL:
mbed_official 138:881eab8cab64 319 can->BTR &= ~(CAN_BTR_SILM | CAN_BTR_LBKM);
mbed_official 138:881eab8cab64 320 success = 1;
mbed_official 138:881eab8cab64 321 break;
mbed_official 138:881eab8cab64 322 case MODE_SILENT:
mbed_official 138:881eab8cab64 323 can->BTR |= CAN_BTR_SILM;
mbed_official 138:881eab8cab64 324 can->BTR &= ~CAN_BTR_LBKM;
mbed_official 138:881eab8cab64 325 success = 1;
mbed_official 138:881eab8cab64 326 break;
mbed_official 138:881eab8cab64 327 case MODE_TEST_GLOBAL:
mbed_official 138:881eab8cab64 328 case MODE_TEST_LOCAL:
mbed_official 138:881eab8cab64 329 can->BTR |= CAN_BTR_LBKM;
mbed_official 138:881eab8cab64 330 can->BTR &= ~CAN_BTR_SILM;
mbed_official 138:881eab8cab64 331 success = 1;
mbed_official 138:881eab8cab64 332 break;
mbed_official 138:881eab8cab64 333 case MODE_TEST_SILENT:
mbed_official 138:881eab8cab64 334 can->BTR |= (CAN_BTR_SILM | CAN_BTR_LBKM);
mbed_official 138:881eab8cab64 335 success = 1;
mbed_official 138:881eab8cab64 336 break;
mbed_official 138:881eab8cab64 337 default:
mbed_official 138:881eab8cab64 338 success = 0;
mbed_official 138:881eab8cab64 339 break;
mbed_official 138:881eab8cab64 340 }
mbed_official 138:881eab8cab64 341 can->MCR &= ~(uint32_t)CAN_MCR_INRQ;
<> 150:02e0a0aed4ec 342 while ((can->MSR & CAN_MSR_INAK) == CAN_MSR_INAK) {
mbed_official 138:881eab8cab64 343 }
mbed_official 138:881eab8cab64 344 return success;
mbed_official 138:881eab8cab64 345 }
mbed_official 138:881eab8cab64 346
mbed_official 138:881eab8cab64 347 int can_filter(can_t *obj, uint32_t id, uint32_t mask, CANFormat format, int32_t handle)
mbed_official 138:881eab8cab64 348 {
<> 150:02e0a0aed4ec 349 int retval = 0;
mbed_official 138:881eab8cab64 350
<> 150:02e0a0aed4ec 351 // filter for CANAny format cannot be configured for STM32
<> 150:02e0a0aed4ec 352 if ((format == CANStandard) || (format == CANExtended)) {
<> 150:02e0a0aed4ec 353 CanHandle.Instance = (CAN_TypeDef *)(obj->can);
<> 150:02e0a0aed4ec 354 CAN_FilterConfTypeDef sFilterConfig;
<> 150:02e0a0aed4ec 355 sFilterConfig.FilterNumber = handle;
<> 150:02e0a0aed4ec 356 sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
<> 150:02e0a0aed4ec 357 sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
<> 150:02e0a0aed4ec 358
<> 150:02e0a0aed4ec 359 if (format == CANStandard) {
<> 150:02e0a0aed4ec 360 sFilterConfig.FilterIdHigh = id << 5;
<> 150:02e0a0aed4ec 361 sFilterConfig.FilterIdLow = 0x0;
<> 150:02e0a0aed4ec 362 sFilterConfig.FilterMaskIdHigh = mask << 5;
<> 150:02e0a0aed4ec 363 sFilterConfig.FilterMaskIdLow = 0x0; // allows both remote and data frames
<> 150:02e0a0aed4ec 364 } else if (format == CANExtended) {
<> 150:02e0a0aed4ec 365 sFilterConfig.FilterIdHigh = id >> 13; // EXTID[28:13]
<> 150:02e0a0aed4ec 366 sFilterConfig.FilterIdLow = (0x00FF & (id << 3)) | (1 << 2); // EXTID[12:0]
<> 150:02e0a0aed4ec 367 sFilterConfig.FilterMaskIdHigh = mask >> 13;
<> 150:02e0a0aed4ec 368 sFilterConfig.FilterMaskIdLow = (0x00FF & (mask << 3)) | (1 << 2);
<> 150:02e0a0aed4ec 369 }
<> 150:02e0a0aed4ec 370
<> 150:02e0a0aed4ec 371 sFilterConfig.FilterFIFOAssignment = 0;
<> 150:02e0a0aed4ec 372 sFilterConfig.FilterActivation = ENABLE;
<> 150:02e0a0aed4ec 373 sFilterConfig.BankNumber = 14 + handle;
<> 150:02e0a0aed4ec 374
<> 150:02e0a0aed4ec 375 HAL_CAN_ConfigFilter(&CanHandle, &sFilterConfig);
<> 150:02e0a0aed4ec 376 retval = handle;
<> 150:02e0a0aed4ec 377 }
<> 150:02e0a0aed4ec 378 return retval;
mbed_official 138:881eab8cab64 379 }
mbed_official 138:881eab8cab64 380
mbed_official 138:881eab8cab64 381 static void can_irq(CANName name, int id)
mbed_official 138:881eab8cab64 382 {
mbed_official 138:881eab8cab64 383 uint32_t tmp1 = 0, tmp2 = 0, tmp3 = 0;
mbed_official 138:881eab8cab64 384 CanHandle.Instance = (CAN_TypeDef *)name;
mbed_official 138:881eab8cab64 385
<> 150:02e0a0aed4ec 386 if (__HAL_CAN_GET_IT_SOURCE(&CanHandle, CAN_IT_TME)) {
mbed_official 138:881eab8cab64 387 tmp1 = __HAL_CAN_TRANSMIT_STATUS(&CanHandle, CAN_TXMAILBOX_0);
mbed_official 138:881eab8cab64 388 tmp2 = __HAL_CAN_TRANSMIT_STATUS(&CanHandle, CAN_TXMAILBOX_1);
mbed_official 138:881eab8cab64 389 tmp3 = __HAL_CAN_TRANSMIT_STATUS(&CanHandle, CAN_TXMAILBOX_2);
mbed_official 138:881eab8cab64 390 if(tmp1 || tmp2 || tmp3)
mbed_official 138:881eab8cab64 391 {
mbed_official 138:881eab8cab64 392 irq_handler(can_irq_ids[id], IRQ_TX);
mbed_official 138:881eab8cab64 393 }
mbed_official 138:881eab8cab64 394 }
mbed_official 138:881eab8cab64 395
mbed_official 138:881eab8cab64 396 tmp1 = __HAL_CAN_MSG_PENDING(&CanHandle, CAN_FIFO0);
mbed_official 138:881eab8cab64 397 tmp2 = __HAL_CAN_GET_IT_SOURCE(&CanHandle, CAN_IT_FMP0);
mbed_official 138:881eab8cab64 398
<> 150:02e0a0aed4ec 399 if ((tmp1 != 0) && tmp2) {
mbed_official 138:881eab8cab64 400 irq_handler(can_irq_ids[id], IRQ_RX);
mbed_official 138:881eab8cab64 401 }
mbed_official 138:881eab8cab64 402
mbed_official 138:881eab8cab64 403 tmp1 = __HAL_CAN_GET_FLAG(&CanHandle, CAN_FLAG_EPV);
mbed_official 138:881eab8cab64 404 tmp2 = __HAL_CAN_GET_IT_SOURCE(&CanHandle, CAN_IT_EPV);
mbed_official 138:881eab8cab64 405 tmp3 = __HAL_CAN_GET_IT_SOURCE(&CanHandle, CAN_IT_ERR);
mbed_official 138:881eab8cab64 406
<> 150:02e0a0aed4ec 407 if (tmp1 && tmp2 && tmp3) {
mbed_official 138:881eab8cab64 408 irq_handler(can_irq_ids[id], IRQ_PASSIVE);
mbed_official 138:881eab8cab64 409 }
mbed_official 138:881eab8cab64 410
mbed_official 138:881eab8cab64 411 tmp1 = __HAL_CAN_GET_FLAG(&CanHandle, CAN_FLAG_BOF);
mbed_official 138:881eab8cab64 412 tmp2 = __HAL_CAN_GET_IT_SOURCE(&CanHandle, CAN_IT_BOF);
mbed_official 138:881eab8cab64 413 tmp3 = __HAL_CAN_GET_IT_SOURCE(&CanHandle, CAN_IT_ERR);
<> 150:02e0a0aed4ec 414 if (tmp1 && tmp2 && tmp3) {
mbed_official 138:881eab8cab64 415 irq_handler(can_irq_ids[id], IRQ_BUS);
mbed_official 138:881eab8cab64 416 }
mbed_official 138:881eab8cab64 417
mbed_official 138:881eab8cab64 418 tmp3 = __HAL_CAN_GET_IT_SOURCE(&CanHandle, CAN_IT_ERR);
<> 150:02e0a0aed4ec 419 if (tmp1 && tmp2 && tmp3) {
mbed_official 138:881eab8cab64 420 irq_handler(can_irq_ids[id], IRQ_ERROR);
mbed_official 138:881eab8cab64 421 }
mbed_official 138:881eab8cab64 422 }
mbed_official 138:881eab8cab64 423
mbed_official 138:881eab8cab64 424 void CAN_IRQHandler(void)
mbed_official 138:881eab8cab64 425 {
mbed_official 138:881eab8cab64 426 can_irq(CAN_1, 0);
mbed_official 138:881eab8cab64 427 }
mbed_official 138:881eab8cab64 428
mbed_official 138:881eab8cab64 429 void can_irq_set(can_t *obj, CanIrqType type, uint32_t enable)
mbed_official 138:881eab8cab64 430 {
mbed_official 138:881eab8cab64 431
mbed_official 138:881eab8cab64 432 CAN_TypeDef *can = (CAN_TypeDef *)(obj->can);
mbed_official 138:881eab8cab64 433 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 138:881eab8cab64 434 uint32_t vector = 0;
mbed_official 138:881eab8cab64 435 uint32_t ier;
mbed_official 138:881eab8cab64 436
<> 150:02e0a0aed4ec 437 if (obj->can == CAN_1) {
mbed_official 138:881eab8cab64 438 switch (type) {
mbed_official 138:881eab8cab64 439 case IRQ_RX:
mbed_official 138:881eab8cab64 440 ier = CAN_IT_FMP0;
mbed_official 138:881eab8cab64 441 break;
mbed_official 138:881eab8cab64 442 case IRQ_TX:
mbed_official 138:881eab8cab64 443 ier = CAN_IT_TME;
mbed_official 138:881eab8cab64 444 break;
mbed_official 138:881eab8cab64 445 case IRQ_ERROR:
mbed_official 138:881eab8cab64 446 ier = CAN_IT_ERR;
mbed_official 138:881eab8cab64 447 break;
mbed_official 138:881eab8cab64 448 case IRQ_PASSIVE:
mbed_official 138:881eab8cab64 449 ier = CAN_IT_EPV;
mbed_official 138:881eab8cab64 450 break;
mbed_official 138:881eab8cab64 451 case IRQ_BUS:
mbed_official 138:881eab8cab64 452 ier = CAN_IT_BOF;
mbed_official 138:881eab8cab64 453 break;
mbed_official 138:881eab8cab64 454 default: return;
mbed_official 138:881eab8cab64 455 }
mbed_official 138:881eab8cab64 456 irq_n = CEC_CAN_IRQn;
mbed_official 138:881eab8cab64 457 vector = (uint32_t)&CAN_IRQHandler;
mbed_official 138:881eab8cab64 458 }
mbed_official 138:881eab8cab64 459
<> 150:02e0a0aed4ec 460 if (enable) {
mbed_official 138:881eab8cab64 461 can->IER |= ier;
mbed_official 138:881eab8cab64 462 } else {
mbed_official 138:881eab8cab64 463 can->IER &= ~ier;
mbed_official 138:881eab8cab64 464 }
mbed_official 138:881eab8cab64 465
mbed_official 138:881eab8cab64 466 NVIC_SetVector(irq_n, vector);
mbed_official 138:881eab8cab64 467 NVIC_EnableIRQ(irq_n);
mbed_official 138:881eab8cab64 468 }
mbed_official 138:881eab8cab64 469
mbed_official 138:881eab8cab64 470 #endif // DEVICE_CAN
mbed_official 138:881eab8cab64 471