Based on user/ft/stm32-dev-bridge, without the project-specific build

directories (and duplicated code).

1 files changed, 205 insertions, 0 deletions

diff --git a/short-test.c b/short-test.c
new file mode 100644
index 0000000..6dd97f4
--- /dev/null
+++ b/short-test.c
@@ -0,0 +1,205 @@
+/*
+ * 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);
+    HAL_UART_Transmit(&huart2, (uint8_t *) "\r\n\r\n\r\n\r\n\r\n", 10, 0x1);
+
+    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);
+
+  HAL_UART_Transmit(&huart2, (uint8_t *) "Wrote ", 6, 0x1);
+  uart_send_binary(wrote_value, 16);
+
+  HAL_UART_Transmit(&huart2, (uint8_t *) " to port GPIO", 13, 0x1);
+  HAL_UART_Transmit(&huart2, (uint8_t *) &wrote_port, 1, 0x1);
+
+  HAL_UART_Transmit(&huart2, (uint8_t *) ", read ", 7, 0x1);
+  uart_send_binary(read, 16);
+
+  HAL_UART_Transmit(&huart2, (uint8_t *) " from GPIO", 10, 0x1);
+  HAL_UART_Transmit(&huart2, (uint8_t *) &port, 1, 0x1);
+
+  HAL_UART_Transmit(&huart2, (uint8_t *) "\r\n", 2, 0x1);
+
+  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);
+      HAL_UART_Transmit(&huart2, (uint8_t *) "GPIO", 4, 0x1);
+      HAL_UART_Transmit(&huart2, (uint8_t *) &port, 1, 0x1);
+
+      HAL_UART_Transmit(&huart2, (uint8_t *) " exp ", 5, 0x1);
+      uart_send_binary(Test_Pin, 16);
+
+      HAL_UART_Transmit(&huart2, (uint8_t *) " got ", 5, 0x1);
+      uart_send_binary(read, 16);
+
+      HAL_UART_Transmit(&huart2, (uint8_t *) " diff ", 6, 0x1);
+      uart_send_binary(read ^ Test_Pin, 16);
+
+      HAL_UART_Transmit(&huart2, (uint8_t *) "\r\n", 2, 0x1);
+
+      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) {
+    HAL_UART_Transmit(&huart2, (uint8_t *) "\r\n", 2, 0x1);
+  }
+}