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Add displaying T @ oLED screen

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eddyem
2018-05-28 22:48:44 +03:00
parent 87784ffbda
commit 5741d2d2a7
19 changed files with 6283 additions and 0 deletions
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60
STM32/Tcalc_screen/spi.c Normal file
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/*
* geany_encoding=koi8-r
* spi.c
*
* Copyright 2018 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*/
#include "spi.h"
#include "usart.h"
extern volatile uint32_t Tms;
static uint32_t tstart;
extern void printu(uint32_t val);
#define CHK(x, msg) do{tstart = Tms; do{if(Tms - tstart > 2){/*printu(SPI1->SR); SEND(msg);*/ return;}}while(x);}while(0)
/**
* send 1 byte blocking
* return 1 on success
*/
void spi_write_byte(uint8_t data){
CHK(!(SPI1->SR & SPI_SR_TXE), "TXEb1\n");
// AHTUNG! without *((uint8_t*) STM32 will try to send TWO bytes (with second byte == 0)
*((uint8_t*)&(SPI1->DR)) = data;
CHK(!(SPI1->SR & SPI_SR_TXE), "TXEb2\n");
CHK(SPI1->SR & SPI_SR_BSY, "BSYb\n");
}
/**
* Blocking rite data to current SPI
* @param data - buffer with data
* @param len - buffer length
* @return 0 in case of error (or 1 in case of success)
*/
void spiWrite(uint8_t *data, uint16_t len){
uint16_t i;
CHK(!(SPI1->SR & SPI_SR_TXE), "TXE1\n");
for(i = 0; i < len; ++i){
*((uint8_t*)&(SPI1->DR)) = data[i];
CHK(!(SPI1->SR & SPI_SR_TXE), "TXE2\n");
}
CHK(SPI1->SR & SPI_SR_BSY, "BSY\n");
}