From 26f12903dab2fafeaaefb02349763618ce96d070 Mon Sep 17 00:00:00 2001
From: Paul Selkirk <paul@psgd.org>
Date: Mon, 26 Oct 2015 15:18:58 -0400
Subject: Based on user/ft/stm32-dev-bridge, without the project-specific build
 directories (and duplicated code).

---
 src/stm-uart.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 src/stm-uart.c

(limited to 'src/stm-uart.c')

diff --git a/src/stm-uart.c b/src/stm-uart.c
new file mode 100644
index 0000000..61ba910
--- /dev/null
+++ b/src/stm-uart.c
@@ -0,0 +1,85 @@
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_hal.h"
+#include "stm-uart.h"
+
+#include <string.h>
+
+UART_HandleTypeDef huart2;
+
+extern void Error_Handler();
+
+
+/* Private variables ---------------------------------------------------------*/
+
+/* Private function prototypes -----------------------------------------------*/
+
+#if 0 /* XXX moved [back] to stm-init.c */
+/* USART2 init function */
+void MX_USART2_UART_Init(void)
+{
+  huart2.Instance = USART2;
+  huart2.Init.BaudRate = USART2_BAUD_RATE;
+  huart2.Init.WordLength = UART_WORDLENGTH_8B;
+  huart2.Init.StopBits = UART_STOPBITS_1;
+  huart2.Init.Parity = UART_PARITY_NONE;
+  huart2.Init.Mode = UART_MODE_TX_RX;
+  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
+
+  if (HAL_UART_Init(&huart2) != HAL_OK) {
+    /* Initialization Error */
+    Error_Handler();
+  }
+}
+#endif
+
+void uart_send_binary(uint32_t num, uint8_t bits)
+{
+  uint32_t i;
+  unsigned char ch;
+
+  bits--;  /* bits 4 should give i = 1000, not 10000 */
+
+  i = 1 << bits;
+  while (i) {
+    ch = '0';
+    if (num & i) {
+      ch = '1';
+    }
+
+    HAL_UART_Transmit(&huart2, (uint8_t *) &ch, 1, 0x1);
+    i = i >> 1;
+  }
+}
+
+void uart_send_string(char *s)
+{
+  HAL_UART_Transmit(&huart2, (uint8_t *) s, strlen(s), 0x1);
+}
+
+void uart_send_integer(uint32_t data, uint32_t mag) {
+  uint32_t i, t;
+  unsigned char ch;
+
+  if (! mag) {
+    /* Find magnitude */
+    if (data < 10) {
+      ch = '0' + data;
+      HAL_UART_Transmit(&huart2, (uint8_t *) &ch, 1, 0x1);
+      return;
+    }
+
+    for (mag = 10; mag < data; mag = i) {
+      i = mag * 10;
+      if (i > data || i < mag)
+        break;
+    }
+  }
+  /* mag is now 10 if data is 45, and 1000 if data is 1009 */
+  for (i = mag; i; i /= 10) {
+    t = (data / i);
+    ch = '0' + t;
+    HAL_UART_Transmit(&huart2, (uint8_t *) &ch, 1, 0x1);
+    data -= (t * i);
+  }
+}
-- 
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