/*
* Test code that just sends the letters 'a' to 'z' over and
* over again using USART2.
*
* Toggles the BLUE LED slowly and the RED LED for every
* character sent.
*/
#include "stm32f4xx_hal.h"
#include "stm-init.h"
#include "stm-led.h"
#include "stm-uart.h"
void test_for_shorts(char port, GPIO_TypeDef* GPIOx, uint16_t GPIO_Test_Pins);
//------------------------------------------------------------------------------
// Defines
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
// Macros
//------------------------------------------------------------------------------
/* These are all the pins used by the FMC interface */
#define GPIOB_PINS (GPIO_PIN_7)
#define GPIOD_PINS (GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11 \
|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15 \
|GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_3|GPIO_PIN_4 \
|GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7)
#define GPIOE_PINS (GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_7 \
|GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11 \
|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15)
#define GPIOF_PINS (GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3 \
|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_12|GPIO_PIN_13 \
|GPIO_PIN_14|GPIO_PIN_15)
#define GPIOG_PINS (GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3 \
|GPIO_PIN_4|GPIO_PIN_5)
#define GPIOH_PINS (GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11 \
|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15)
#define GPIOI_PINS (GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_0|GPIO_PIN_1 \
|GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_6|GPIO_PIN_7)
int
main()
{
stm_init();
// enable gpio clocks
__GPIOA_CLK_ENABLE();
__GPIOB_CLK_ENABLE();
__GPIOD_CLK_ENABLE();
__GPIOE_CLK_ENABLE();
__GPIOF_CLK_ENABLE();
__GPIOG_CLK_ENABLE();
__GPIOH_CLK_ENABLE();
__GPIOI_CLK_ENABLE();
while (1) {
HAL_GPIO_TogglePin(LED_PORT, LED_GREEN);
uart_send_string("\r\n\r\n\r\n\r\n\r\n");
test_for_shorts('B', GPIOB, GPIOB_PINS);
test_for_shorts('D', GPIOD, GPIOD_PINS);
test_for_shorts('E', GPIOE, GPIOE_PINS);
test_for_shorts('F', GPIOF, GPIOF_PINS);
test_for_shorts('G', GPIOG, GPIOG_PINS);
test_for_shorts('H', GPIOH, GPIOH_PINS);
test_for_shorts('I', GPIOI, GPIOI_PINS);
led_toggle(LED_BLUE);
HAL_Delay(2000);
}
}
void configure_all_as_input(GPIO_TypeDef* GPIOx, uint16_t GPIO_Test_Pins)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* Configure all pins as input. XXX do all pins (0xffff) instead of just GPIO_Test_Pins? */
GPIO_InitStruct.Pin = GPIO_Test_Pins;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
HAL_GPIO_Init(GPIOx, &GPIO_InitStruct);
}
uint8_t check_no_input(char port, GPIO_TypeDef* GPIOx, uint16_t GPIO_Test_Pins, char wrote_port, uint16_t wrote_value)
{
uint16_t read;
/* Read all pins from port at once. XXX check all pins, not just GPIO_Test_Pins? */
read = (GPIOx->IDR & GPIO_Test_Pins);
if (! read) {
/* No unexpected pins read as HIGH */
return 0;
}
led_on(LED_RED);
uart_send_string("Wrote ");
uart_send_binary(wrote_value, 16);
uart_send_string(" to port GPIO");
uart_send_char(wrote_port);
uart_send_string(", read ");
uart_send_binary(read, 16);
uart_send_string(" from GPIO");
uart_send_char(port);
uart_send_string("\r\n");
return 1;
}
void test_for_shorts(char port, GPIO_TypeDef* GPIOx, uint16_t GPIO_Test_Pins)
{
GPIO_InitTypeDef GPIO_InitStruct;
uint16_t i, fail = 0, Test_Pin, read;
configure_all_as_input(GPIOB, GPIOB_PINS);
configure_all_as_input(GPIOD, GPIOD_PINS);
configure_all_as_input(GPIOE, GPIOE_PINS);
configure_all_as_input(GPIOF, GPIOF_PINS);
configure_all_as_input(GPIOG, GPIOG_PINS);
configure_all_as_input(GPIOH, GPIOH_PINS);
configure_all_as_input(GPIOI, GPIOI_PINS);
check_no_input('B', GPIOB, GPIOB_PINS, 'x', 0);
check_no_input('D', GPIOD, GPIOD_PINS, 'x', 0);
check_no_input('E', GPIOE, GPIOE_PINS, 'x', 0);
check_no_input('F', GPIOF, GPIOF_PINS, 'x', 0);
check_no_input('G', GPIOG, GPIOG_PINS, 'x', 0);
check_no_input('H', GPIOH, GPIOH_PINS, 'x', 0);
check_no_input('I', GPIOI, GPIOI_PINS, 'x', 0);
for (i = 0; i < 31; i++) {
Test_Pin = 1 << i;
if (! (GPIO_Test_Pins & Test_Pin)) continue;
configure_all_as_input(GPIOx, GPIO_Test_Pins);
/* Change one pin to output */
GPIO_InitStruct.Pin = Test_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
HAL_GPIO_Init(GPIOx, &GPIO_InitStruct);
HAL_GPIO_WritePin(GPIOx, Test_Pin, GPIO_PIN_SET);
/* Slight delay after setting the output pin. Without this, the Test_Pin
bit might read as zero, as it is only sampled once every AHB1 clock cycle.
Reference manual DM00031020 section 8.3.1.
*/
HAL_Delay(1);
/* Read all input GPIOs from port at once. XXX check all pins, not just GPIO_Test_Pins? */
read = GPIOx->IDR & GPIO_Test_Pins;
if (read == Test_Pin) {
/* No unexpected pins read as HIGH */
led_toggle(LED_GREEN);
} else {
led_on(LED_RED);
uart_send_string("GPIO");
uart_send_char(port);
uart_send_string(" exp ");
uart_send_binary(Test_Pin, 16);
uart_send_string(" got ");
uart_send_binary(read, 16);
uart_send_string(" diff ");
uart_send_binary(read ^ Test_Pin, 16);
uart_send_string("\r\n");
fail++;
}
/* Check there is no input on any of the other GPIO ports (adjacent pins might live on different ports) */
if (port != 'B') fail += check_no_input('B', GPIOB, GPIOB_PINS, port, Test_Pin);
if (port != 'D') fail += check_no_input('D', GPIOD, GPIOD_PINS, port, Test_Pin);
if (port != 'E') fail += check_no_input('E', GPIOE, GPIOE_PINS, port, Test_Pin);
if (port != 'F') fail += check_no_input('F', GPIOF, GPIOF_PINS, port, Test_Pin);
if (port != 'G') fail += check_no_input('G', GPIOG, GPIOG_PINS, port, Test_Pin);
if (port != 'H') fail += check_no_input('H', GPIOH, GPIOH_PINS, port, Test_Pin);
if (port != 'I') fail += check_no_input('I', GPIOI, GPIOI_PINS, port, Test_Pin);
HAL_GPIO_WritePin(GPIOx, Test_Pin, GPIO_PIN_RESET);
}
if (fail) {
uart_send_string("\r\n");
}
}
