Yaroslav Barabanov / Mbed 2 deprecated STM32_F1XX_Alternative

Here, alternative functions and classes for STM32. The program contains a class for the I2C software bus, a class for working with a watchdog timer and time delay functions based on DWT. All functions and classes use the HAL library. Functions and classes were written for the microcontroller stm32f103.

Dependencies:   Stm32F1xx_Alternative mbed

main.cpp@0:a5f82a6b0d16, 2017-05-24 (annotated)

Committer:
Yar
Date:
Wed May 24 19:13:08 2017 +0000
Revision:
0:a5f82a6b0d16
Here, alternative functions and classes for STM32. The program contains a class for the I2C software bus, a class for working with a watchdog timer and time delay functions based on DWT. All functions and classes use the HAL library.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Yar 0:a5f82a6b0d16 1 #include "mbed.h"
Yar 0:a5f82a6b0d16 2 #include "Stm32F1xxAlternative.hpp"
Yar 0:a5f82a6b0d16 3
Yar 0:a5f82a6b0d16 4
Yar 0:a5f82a6b0d16 5 DigitalOut myled(LED1);
Yar 0:a5f82a6b0d16 6
Yar 0:a5f82a6b0d16 7 // Declare the legs of the microcontroller to work with the I2C software bus
Yar 0:a5f82a6b0d16 8 #define _GPIO_Pin_9 (1<<9) // It is the 9 leg any port of the microcontroller
Yar 0:a5f82a6b0d16 9 #define _GPIO_Pin_8 (1<<8) // It is the 8 leg any port of the microcontroller
Yar 0:a5f82a6b0d16 10 // This is the class for working with the I2C software bus
Yar 0:a5f82a6b0d16 11 // By default, the I2C frequency is 100 kHz
Yar 0:a5f82a6b0d16 12 // In the example, the legs of the PC_9 microcontroller are used for SCL
Yar 0:a5f82a6b0d16 13 // and PC_8 for SDA (SCL port, SDA, port, SCL pin, SDA pin)
Yar 0:a5f82a6b0d16 14 SoftwareI2C _i2c(GPIOC, GPIOC, _GPIO_Pin_9, _GPIO_Pin_8);
Yar 0:a5f82a6b0d16 15
Yar 0:a5f82a6b0d16 16
Yar 0:a5f82a6b0d16 17 // Class for watchdog timer
Yar 0:a5f82a6b0d16 18 #if (1)
Yar 0:a5f82a6b0d16 19 // You can initialize as follows:
Yar 0:a5f82a6b0d16 20 WatchdogTimer Watchdog(10.0);
Yar 0:a5f82a6b0d16 21 #else
Yar 0:a5f82a6b0d16 22 // Or you can initialize this way:
Yar 0:a5f82a6b0d16 23 WatchdogTimer Watchdog();
Yar 0:a5f82a6b0d16 24 #endif
Yar 0:a5f82a6b0d16 25
Yar 0:a5f82a6b0d16 26 // So you can find out the status of the watchdog timer
Yar 0:a5f82a6b0d16 27 void WatchdogStatus(void) {
Yar 0:a5f82a6b0d16 28 switch (Watchdog.getStatus()) {
Yar 0:a5f82a6b0d16 29 case WatchdogTimer::RESET: // IWDG not yet initialized or disabled
Yar 0:a5f82a6b0d16 30 printf("IWDG not yet initialized or disabled\r\n");
Yar 0:a5f82a6b0d16 31 break;
Yar 0:a5f82a6b0d16 32 case WatchdogTimer::READY: // IWDG initialized and ready for use
Yar 0:a5f82a6b0d16 33 printf("IIWDG initialized and ready for use\r\n");
Yar 0:a5f82a6b0d16 34 break;
Yar 0:a5f82a6b0d16 35 case WatchdogTimer::BUSY: // IWDG internal process is ongoing
Yar 0:a5f82a6b0d16 36 printf("IWDG internal process is ongoing\r\n");
Yar 0:a5f82a6b0d16 37 break;
Yar 0:a5f82a6b0d16 38 case WatchdogTimer::TIMEOUT: // IWDG timeout state
Yar 0:a5f82a6b0d16 39 printf("IWDG timeout state\r\n");
Yar 0:a5f82a6b0d16 40 break;
Yar 0:a5f82a6b0d16 41 case WatchdogTimer::ERROR: // IWDG error state
Yar 0:a5f82a6b0d16 42 printf("IWDG error state\r\n");
Yar 0:a5f82a6b0d16 43 break;
Yar 0:a5f82a6b0d16 44 default:
Yar 0:a5f82a6b0d16 45 printf("Unknown state\r\n");
Yar 0:a5f82a6b0d16 46 break;
Yar 0:a5f82a6b0d16 47 }
Yar 0:a5f82a6b0d16 48 }
Yar 0:a5f82a6b0d16 49
Yar 0:a5f82a6b0d16 50
Yar 0:a5f82a6b0d16 51
Yar 0:a5f82a6b0d16 52
Yar 0:a5f82a6b0d16 53 int main() {
Yar 0:a5f82a6b0d16 54 #if (0)
Yar 0:a5f82a6b0d16 55 // You can pre-initialize an alternative time delay
Yar 0:a5f82a6b0d16 56 initializeTimeDelays();
Yar 0:a5f82a6b0d16 57 // Otherwise, initialization will be called automatically
Yar 0:a5f82a6b0d16 58 // the first time you call the function delay_ms or delay_us
Yar 0:a5f82a6b0d16 59 #endif
Yar 0:a5f82a6b0d16 60 #if (0)
Yar 0:a5f82a6b0d16 61 // You can re-initialize the watchdog
Yar 0:a5f82a6b0d16 62 // The maximum time is 32 seconds
Yar 0:a5f82a6b0d16 63 Watchdog.setResponseTime_s(10);
Yar 0:a5f82a6b0d16 64 //Watchdog.setResponseTime_us(10000000);
Yar 0:a5f82a6b0d16 65 //Watchdog.setResponseTime_ms(10000);
Yar 0:a5f82a6b0d16 66 #endif
Yar 0:a5f82a6b0d16 67 // We get the state of the watchdog timer
Yar 0:a5f82a6b0d16 68 WatchdogStatus();
Yar 0:a5f82a6b0d16 69 // Run watchdog
Yar 0:a5f82a6b0d16 70 Watchdog.start();
Yar 0:a5f82a6b0d16 71
Yar 0:a5f82a6b0d16 72
Yar 0:a5f82a6b0d16 73 #if (1)
Yar 0:a5f82a6b0d16 74 // Example of using the software I2C
Yar 0:a5f82a6b0d16 75 uint8_t _addr = 0x4E;
Yar 0:a5f82a6b0d16 76 uint8_t _reg = 0x20;
Yar 0:a5f82a6b0d16 77 uint8_t _data = 0x55;
Yar 0:a5f82a6b0d16 78 _i2c.start(); // Signal start
Yar 0:a5f82a6b0d16 79 _i2c.write(_addr << 1); // Transfer the address of the device
Yar 0:a5f82a6b0d16 80 _i2c.write(_reg); // Transfer the number of the register
Yar 0:a5f82a6b0d16 81 _i2c.write(_data); // Write the data in the register
Yar 0:a5f82a6b0d16 82 _i2c.stop(); //
Yar 0:a5f82a6b0d16 83 // You can also use this function
Yar 0:a5f82a6b0d16 84 // void write(uint8_t address, uint8_t* data, uint8_t length);
Yar 0:a5f82a6b0d16 85 #endif
Yar 0:a5f82a6b0d16 86
Yar 0:a5f82a6b0d16 87
Yar 0:a5f82a6b0d16 88 while(1) {
Yar 0:a5f82a6b0d16 89 myled = !myled;
Yar 0:a5f82a6b0d16 90 // This is an alternative delay for milliseconds
Yar 0:a5f82a6b0d16 91 // For microseconds, there is a function delay_us
Yar 0:a5f82a6b0d16 92 delay_ms(1000);
Yar 0:a5f82a6b0d16 93 // Update Watchdog
Yar 0:a5f82a6b0d16 94 // If this is not done,
Yar 0:a5f82a6b0d16 95 // the watchdog timer will automatically reset the microcontroller
Yar 0:a5f82a6b0d16 96 Watchdog.refresh();
Yar 0:a5f82a6b0d16 97 }
Yar 0:a5f82a6b0d16 98 }