mirror of
https://github.com/eddyem/stm32samples.git
synced 2025-12-06 02:35:23 +03:00
95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/*
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* This file is part of the bme280 project.
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* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stm32f3.h>
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#include <string.h>
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#include "spi.h"
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#include "strfunc.h"
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#include "usb_dev.h"
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#include "version.inc"
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#define LOCBUFFSZ (32)
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// local buffer for SPI data to send
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static uint8_t locBuffer[LOCBUFFSZ];
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static const char *ERR = "ERR\n", *OK = "OK\n";
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extern volatile uint32_t Tms;
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const char *helpstring =
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"https://github.com/eddyem/stm32samples/tree/master/F3:F303/xxx build#" BUILD_NUMBER " @ " BUILD_DATE "\n"
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"i - [re]init SPI1\n"
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"s - send up to 32 bytes of data and read answer\n"
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"T - print current Tms\n"
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;
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// read N numbers from buf, @return 0 if wrong or none
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TRUE_INLINE uint16_t readNnumbers(const char *buf){
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uint32_t D;
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const char *nxt;
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uint16_t N = 0;
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while((nxt = getnum(buf, &D)) && nxt != buf && N < LOCBUFFSZ){
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if(D > 0xff){ USND("Each number should be uint8_t"); return 0; }
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buf = nxt;
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locBuffer[N++] = (uint8_t) D&0xff;
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USND("add byte: "); USND(uhex2str(D&0xff)); USND("\n");
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}
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USND("Send "); USND(u2str(N)); USND(" bytes\n");
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return N;
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}
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TRUE_INLINE const char* spirdwr(const char *buf){
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if(spi_status != SPI_READY){ USND("SPI not ready!"); return NULL; }
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uint16_t got = readNnumbers(buf);
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if(got < 1){ USND("Enter at least one uint8_t"); return NULL; }
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if(!spi_writeread(locBuffer, got)) return ERR;
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USND("Read data:");
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hexdump(USB_sendstr, locBuffer, got);
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return NULL;
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}
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const char *parse_cmd(const char *buf){
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// "long" commands
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if(buf[1]){
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char c = *buf++;
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switch(c){
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case 's':
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return spirdwr(buf);
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default: return buf; // echo input
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}
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}
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/* switch(*buf){
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case '':
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break;
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}*/
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// "short" commands
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switch(*buf){
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case 'i':
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spi_setup();
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return OK;
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case 'T':
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USB_sendstr("T=");
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USB_sendstr(u2str(Tms));
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newline();
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break;
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default: // help
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USB_sendstr(helpstring);
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break;
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}
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return NULL;
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}
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