Amir Chaudhary / Mbed 2 deprecated Board_RGB_Relay_Test_copy

Watchdog Code --> IWDG Register Enable Code

Dependencies:   mbed

main.cpp@0:57d5f9a58ad1, 2020-03-31 (annotated)

Committer:
amirchaudhary
Date:
Tue Mar 31 10:17:51 2020 +0000
Revision:
0:57d5f9a58ad1
Watchdog Test code --> IWDG Register Enable

Who changed what in which revision?

UserRevisionLine numberNew contents of line
amirchaudhary 0:57d5f9a58ad1 1 #include "mbed.h"
amirchaudhary 0:57d5f9a58ad1 2 #include "stm32l0xx_hal_iwdg.h"
amirchaudhary 0:57d5f9a58ad1 3
amirchaudhary 0:57d5f9a58ad1 4 /*------------------------------------------------------------------------------
amirchaudhary 0:57d5f9a58ad1 5 Before to use this example, ensure that you an hyperterminal installed on your
amirchaudhary 0:57d5f9a58ad1 6 computer. More info here: https://developer.mbed.org/handbook/Terminals
amirchaudhary 0:57d5f9a58ad1 7
amirchaudhary 0:57d5f9a58ad1 8 The default serial comm port uses the SERIAL_TX and SERIAL_RX pins (see their
amirchaudhary 0:57d5f9a58ad1 9 definition in the PinNames.h file).
amirchaudhary 0:57d5f9a58ad1 10
amirchaudhary 0:57d5f9a58ad1 11 The default serial configuration in this case is 9600 bauds, 8-bit data, no parity
amirchaudhary 0:57d5f9a58ad1 12
amirchaudhary 0:57d5f9a58ad1 13 If you want to change the baudrate for example, you have to redeclare the
amirchaudhary 0:57d5f9a58ad1 14 serial object in your code:
amirchaudhary 0:57d5f9a58ad1 15
amirchaudhary 0:57d5f9a58ad1 16 Serial pc(SERIAL_TX, SERIAL_RX);
amirchaudhary 0:57d5f9a58ad1 17
amirchaudhary 0:57d5f9a58ad1 18 Then, you can modify the baudrate and print like this:
amirchaudhary 0:57d5f9a58ad1 19
amirchaudhary 0:57d5f9a58ad1 20 pc.baud(115200);
amirchaudhary 0:57d5f9a58ad1 21 pc.printf("Hello World !\n");
amirchaudhary 0:57d5f9a58ad1 22 ------------------------------------------------------------------------------*/
amirchaudhary 0:57d5f9a58ad1 23 DigitalOut led(D7);
amirchaudhary 0:57d5f9a58ad1 24 DigitalOut myBlueLed(PA_11);
amirchaudhary 0:57d5f9a58ad1 25 DigitalOut relayPin(PB_10);
amirchaudhary 0:57d5f9a58ad1 26
amirchaudhary 0:57d5f9a58ad1 27 int MY_SetSysClock_PLL_HSE(void)
amirchaudhary 0:57d5f9a58ad1 28 {
amirchaudhary 0:57d5f9a58ad1 29 RCC_ClkInitTypeDef RCC_ClkInitStruct;
amirchaudhary 0:57d5f9a58ad1 30 RCC_OscInitTypeDef RCC_OscInitStruct;
amirchaudhary 0:57d5f9a58ad1 31
amirchaudhary 0:57d5f9a58ad1 32 /* Enable HSE and activate PLL with HSE as source */
amirchaudhary 0:57d5f9a58ad1 33 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
amirchaudhary 0:57d5f9a58ad1 34 RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
amirchaudhary 0:57d5f9a58ad1 35
amirchaudhary 0:57d5f9a58ad1 36 // PLLCLK = (8 MHz * 8)/2 = 32 MHz
amirchaudhary 0:57d5f9a58ad1 37 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
amirchaudhary 0:57d5f9a58ad1 38 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
amirchaudhary 0:57d5f9a58ad1 39 RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_8;
amirchaudhary 0:57d5f9a58ad1 40 RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
amirchaudhary 0:57d5f9a58ad1 41 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
amirchaudhary 0:57d5f9a58ad1 42 return (-1); // FAIL
amirchaudhary 0:57d5f9a58ad1 43 }
amirchaudhary 0:57d5f9a58ad1 44
amirchaudhary 0:57d5f9a58ad1 45 /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
amirchaudhary 0:57d5f9a58ad1 46 RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
amirchaudhary 0:57d5f9a58ad1 47 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 32 MHz
amirchaudhary 0:57d5f9a58ad1 48 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 32 MHz
amirchaudhary 0:57d5f9a58ad1 49 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 32 MHz
amirchaudhary 0:57d5f9a58ad1 50 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 32 MHz
amirchaudhary 0:57d5f9a58ad1 51 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) {
amirchaudhary 0:57d5f9a58ad1 52 return (-2); // FAIL
amirchaudhary 0:57d5f9a58ad1 53 }
amirchaudhary 0:57d5f9a58ad1 54
amirchaudhary 0:57d5f9a58ad1 55 /* Enable HSE and activate PLL with HSE as source */
amirchaudhary 0:57d5f9a58ad1 56 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48|RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_MSI;
amirchaudhary 0:57d5f9a58ad1 57 RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
amirchaudhary 0:57d5f9a58ad1 58 RCC_OscInitStruct.MSIState = RCC_MSI_OFF;
amirchaudhary 0:57d5f9a58ad1 59 RCC_OscInitStruct.HSI48State = RCC_HSI48_OFF;
amirchaudhary 0:57d5f9a58ad1 60 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
amirchaudhary 0:57d5f9a58ad1 61 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
amirchaudhary 0:57d5f9a58ad1 62 return (-3); // FAIL
amirchaudhary 0:57d5f9a58ad1 63 }
amirchaudhary 0:57d5f9a58ad1 64
amirchaudhary 0:57d5f9a58ad1 65 return 0; // OK
amirchaudhary 0:57d5f9a58ad1 66 }
amirchaudhary 0:57d5f9a58ad1 67
amirchaudhary 0:57d5f9a58ad1 68 void my_patch(void)
amirchaudhary 0:57d5f9a58ad1 69 {
amirchaudhary 0:57d5f9a58ad1 70 int retVal;
amirchaudhary 0:57d5f9a58ad1 71
amirchaudhary 0:57d5f9a58ad1 72 // Put device into default clock, i.e using MSI = 2MHz
amirchaudhary 0:57d5f9a58ad1 73 HAL_RCC_DeInit();
amirchaudhary 0:57d5f9a58ad1 74
amirchaudhary 0:57d5f9a58ad1 75 // Enable HSE clock
amirchaudhary 0:57d5f9a58ad1 76 retVal = MY_SetSysClock_PLL_HSE();
amirchaudhary 0:57d5f9a58ad1 77 if(retVal< 0)
amirchaudhary 0:57d5f9a58ad1 78 {
amirchaudhary 0:57d5f9a58ad1 79 //pc.printf("Failed to start HSE, ERR= %d\r\n", retVal);
amirchaudhary 0:57d5f9a58ad1 80
amirchaudhary 0:57d5f9a58ad1 81 // indicate error
amirchaudhary 0:57d5f9a58ad1 82 while(1)
amirchaudhary 0:57d5f9a58ad1 83 {
amirchaudhary 0:57d5f9a58ad1 84 led = !led;
amirchaudhary 0:57d5f9a58ad1 85 wait(0.2);
amirchaudhary 0:57d5f9a58ad1 86 }
amirchaudhary 0:57d5f9a58ad1 87 }
amirchaudhary 0:57d5f9a58ad1 88 }
amirchaudhary 0:57d5f9a58ad1 89
amirchaudhary 0:57d5f9a58ad1 90 int main()
amirchaudhary 0:57d5f9a58ad1 91 {
amirchaudhary 0:57d5f9a58ad1 92 Serial pc(SERIAL_TX, SERIAL_RX);
amirchaudhary 0:57d5f9a58ad1 93 pc.baud(115200);
amirchaudhary 0:57d5f9a58ad1 94
amirchaudhary 0:57d5f9a58ad1 95 IWDG_HandleTypeDef wd;
amirchaudhary 0:57d5f9a58ad1 96 wd.Instance = IWDG;
amirchaudhary 0:57d5f9a58ad1 97 wd.Init.Prescaler = IWDG_PRESCALER_256; //About 32s
amirchaudhary 0:57d5f9a58ad1 98 wd.Init.Reload = 0x0FFF;
amirchaudhary 0:57d5f9a58ad1 99 HAL_IWDG_Init(&wd);
amirchaudhary 0:57d5f9a58ad1 100 pc.printf("initialized watchdog CSR= %0X\r\n", RCC->CSR);
amirchaudhary 0:57d5f9a58ad1 101
amirchaudhary 0:57d5f9a58ad1 102
amirchaudhary 0:57d5f9a58ad1 103 pc.printf("mbed-os-rev: %d.%d.%d lib-rev: %d\r\n", \
amirchaudhary 0:57d5f9a58ad1 104 MBED_MAJOR_VERSION, MBED_MINOR_VERSION,MBED_PATCH_VERSION,MBED_LIBRARY_VERSION);
amirchaudhary 0:57d5f9a58ad1 105 pc.printf("BUILD= %s, SysClock= %d, RCC= %0X CSR= %0X\r\n", __TIME__, SystemCoreClock, RCC->CR, RCC->CSR);
amirchaudhary 0:57d5f9a58ad1 106 my_patch();
amirchaudhary 0:57d5f9a58ad1 107 pc.printf("NEW BUILD= %s, SysClock= %d, RCC= %0X CSR= %0X\r\n", __TIME__, SystemCoreClock, RCC->CR, RCC->CSR);
amirchaudhary 0:57d5f9a58ad1 108 wait(3);
amirchaudhary 0:57d5f9a58ad1 109
amirchaudhary 0:57d5f9a58ad1 110 int i = 1;
amirchaudhary 0:57d5f9a58ad1 111
amirchaudhary 0:57d5f9a58ad1 112
amirchaudhary 0:57d5f9a58ad1 113 myBlueLed = 1; // LED is ON
amirchaudhary 0:57d5f9a58ad1 114 wait(0.5); // 500 ms
amirchaudhary 0:57d5f9a58ad1 115 myBlueLed = 0; // LED is ON
amirchaudhary 0:57d5f9a58ad1 116 wait(0.5); // 500 ms
amirchaudhary 0:57d5f9a58ad1 117 relayPin = 1; // LED is ON
amirchaudhary 0:57d5f9a58ad1 118 wait(0.5); // 500 ms
amirchaudhary 0:57d5f9a58ad1 119 relayPin = 0; // LED is ON
amirchaudhary 0:57d5f9a58ad1 120 wait(0.5); // 500 ms
amirchaudhary 0:57d5f9a58ad1 121
amirchaudhary 0:57d5f9a58ad1 122
amirchaudhary 0:57d5f9a58ad1 123 pc.printf("Hello World 2 !\r\n");
amirchaudhary 0:57d5f9a58ad1 124
amirchaudhary 0:57d5f9a58ad1 125 while(1) {
amirchaudhary 0:57d5f9a58ad1 126 wait(1); // 1 second
amirchaudhary 0:57d5f9a58ad1 127 led = !led;
amirchaudhary 0:57d5f9a58ad1 128 relayPin = !relayPin; // LED is ON
amirchaudhary 0:57d5f9a58ad1 129
amirchaudhary 0:57d5f9a58ad1 130
amirchaudhary 0:57d5f9a58ad1 131
amirchaudhary 0:57d5f9a58ad1 132 if (i == 15) {
amirchaudhary 0:57d5f9a58ad1 133
amirchaudhary 0:57d5f9a58ad1 134 //https://github.com/ARMmbed/mbed-os/blob/mbed_lib_rev164/targets/TARGET_STM/TARGET_STM32L0/device/stm32l0xx_hal_iwdg.c
amirchaudhary 0:57d5f9a58ad1 135 /* Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers by writing 0x5555 in KR
amirchaudhary 0:57d5f9a58ad1 136 * This is not done in HAL_IWDG_Refresh() (I THINK SO :->)
amirchaudhary 0:57d5f9a58ad1 137 */
amirchaudhary 0:57d5f9a58ad1 138 IWDG_ENABLE_WRITE_ACCESS(&wd);
amirchaudhary 0:57d5f9a58ad1 139
amirchaudhary 0:57d5f9a58ad1 140 HAL_IWDG_Refresh(&wd);
amirchaudhary 0:57d5f9a58ad1 141 pc.printf("Fed the dog\r\n");
amirchaudhary 0:57d5f9a58ad1 142 }
amirchaudhary 0:57d5f9a58ad1 143 pc.printf("This program runs since %d seconds.\r\n", i++);
amirchaudhary 0:57d5f9a58ad1 144 }
amirchaudhary 0:57d5f9a58ad1 145
amirchaudhary 0:57d5f9a58ad1 146 pc.printf("should never reach here\n");
amirchaudhary 0:57d5f9a58ad1 147 }