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f0 working (one fixme)

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need scan mode upstream?
This commit is contained in:
Karl Palsson 2015-11-03 23:53:42 +00:00
parent c522c29dca
commit 19a85ae45b
6 changed files with 146 additions and 3 deletions
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34
shared/usart_stdio.c Normal file
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@ -0,0 +1,34 @@
/*
* support for stdio output to a usart
* Karl Palsson, 2015 <karlp@tweak.net.au>
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <libopencm3/stm32/usart.h>
#ifndef STDIO_USART
#define STDIO_USART USART1
#endif
int _write(int file, char *ptr, int len);
int _write(int file, char *ptr, int len)
{
int i;
if (file == STDOUT_FILENO || file == STDERR_FILENO) {
for (i = 0; i < len; i++) {
if (ptr[i] == '\n') {
usart_send_blocking(STDIO_USART, '\r');
}
usart_send_blocking(STDIO_USART, ptr[i]);
}
return i;
}
errno = EIO;
return -1;
}