diff options
Diffstat (limited to 'driver_fw/main.c')
| -rw-r--r-- | driver_fw/main.c | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/driver_fw/main.c b/driver_fw/main.c index 8551d83..5960e23 100644 --- a/driver_fw/main.c +++ b/driver_fw/main.c @@ -1,15 +1,33 @@ +/* 8seg LED display driver firmware + * Copyright (C) 2018 Sebastian Götte <code@jaseg.net> + * + * 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 3 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, see <http://www.gnu.org/licenses/>. + */ + #include "global.h" #include "serial.h" #include "i2c.h" #include "lcd1602.h" +#include "mcp9801.h" #include <8b10b.h> /* Part number: STM32F030F4C6 */ volatile unsigned int comm_led_ctr, err_led_ctr; -volatile unsigned int sys_time_tick; +volatile unsigned int sys_time_tick = 0; volatile unsigned int sys_time_ms; volatile unsigned int sys_time_s; unsigned int frame_duration_us; @@ -143,7 +161,8 @@ int main(void) { using a Java(TM) GUI. */ i2c_enable(I2C1); lcd1602_init(); - lcd_write_str(0, 0, "Hello World!"); + /* The MCP9801 temperature sensor is initialized below in the SysTick ISR since it needs a few milliseconds to + * powerup. */ /* TIM3 is used to generate the MOSFET driver control signals */ /* TIM3 running off 48MHz APB1 clk, T=20.833ns */ @@ -161,6 +180,9 @@ int main(void) { txstate.current_symbol = txstate.next_symbol = xfr_8b10b_encode(&txstate.st, K28_1) | 1<<10; TIM3->EGR |= TIM_EGR_UG; + lcd_write_str(0, 0, "8seg driver"); + lcd_write_str(0, 1, "initialized \xbc"); + NVIC_EnableIRQ(TIM3_IRQn); NVIC_SetPriority(TIM3_IRQn, 2<<4); @@ -238,6 +260,19 @@ void SysTick_Handler(void) { if (sys_time_ms++ == 1000) { sys_time_ms = 0; sys_time_s++; + + int32_t temp = mcp9801_read_mdegC(); + temp /= 100; + char buf[17] = { 0 }; + strcpy(buf, "Temp: +XXX.X\xdf""C"" "); + buf[6] = temp >= 0 ? '+' : '-'; + buf[7] = temp/1000 + '0'; + buf[8] = (temp%1000)/100 + '0'; + buf[9] = (temp%100)/10 + '0'; + buf[11] = temp%10 + '0'; + lcd_write_str(0, 0, buf); + lcd_write_str(0, 1, " "" "" "" "); + mcp9801_init(); } /* This is a hack. We could use the SPI interrupt here if that didn't fire at the start instead of end of transmission.... -.- */ |