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annotate comm.c @ 24:1e2fa7396f98

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Reduce prescaler to 2, the flash is capable of 25MHz reads (although the touch screen is limited to ~2.5MHz)
author Daniel O'Connor <darius@dons.net.au>
date Sat, 17 Nov 2012 12:17:58 +1030
parents c59513fd84fb
children
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c59513fd84fb Initial commit of STM32 test code.
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1 /* Martin Thomas 4/2009, 3/2010 */
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2 #include "stm32f10x.h"
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3 #include "comm.h"
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4
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5 #define USARTx USART1
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6
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7 int
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8 comm_test(void) {
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9 return (USART_GetFlagStatus(USARTx, USART_FLAG_RXNE) == RESET) ? 0 : 1;
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10 }
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12 char
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13 comm_get(void) {
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14 while (USART_GetFlagStatus(USARTx, USART_FLAG_RXNE) == RESET)
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15 ;
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16
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17 return (char)USART_ReceiveData(USARTx);
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18 }
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19
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20 void
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21 comm_put(char d) {
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22 while(USART_GetFlagStatus(USARTx, USART_FLAG_TXE) == RESET)
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23 ;
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24
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25 USART_SendData(USARTx, (uint16_t)d);
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26 }
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28 void
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29 comm_puts(const char* s) {
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30 char c;
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31 while ((c = *s++) != '\0') {
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32 comm_put(c);
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33 }
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34 }
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36 void
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37 comm_init (void) {
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38 // already done in main.c
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39 }
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