From: Martin Mares <mj@ucw.cz>
Date: Sat, 6 Jul 2019 22:37:55 +0000 (+0200)
Subject: Test: Heat exchanger bypass control
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=86c630b3cf02e9899457990b9e44dd0a24d18e60;p=home-hw.git

Test: Heat exchanger bypass control
---

diff --git a/test-opencm3/test.c b/test-opencm3/test.c
index b765805..e49bce7 100644
--- a/test-opencm3/test.c
+++ b/test-opencm3/test.c
@@ -20,7 +20,17 @@ static void clock_setup(void)
 
 static void gpio_setup(void)
 {
+	// PC13 = BluePill LED
 	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO13);
+	gpio_clear(GPIOC, GPIO13);
+
+	// PC14 = bypass LED*
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO14);
+	gpio_set(GPIOC, GPIO14);
+
+	// PC15 = bypass opto-coupler
+	gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_50_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO15);
+	gpio_clear(GPIOC, GPIO15);
 }
 
 static volatile u32 ms_ticks;
@@ -51,13 +61,15 @@ static void usart_setup(void)
 	usart_set_baudrate(USART1, 115200);
 	usart_set_databits(USART1, 8);
 	usart_set_stopbits(USART1, USART_STOPBITS_1);
-	usart_set_mode(USART1, USART_MODE_TX);
+	usart_set_mode(USART1, USART_MODE_TX_RX);
 	usart_set_parity(USART1, USART_PARITY_NONE);
 	usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE);
 
 	usart_enable(USART1);
 }
 
+static bool bypass_active;
+
 static void show_temperature(void)
 {
 	debug_putc('#');
@@ -69,6 +81,8 @@ static void show_temperature(void)
 		else
 			debug_printf("%3d.%03d", t / 1000, t % 1000);
 	}
+	debug_putc(' ');
+	debug_putc('0' + bypass_active);
 	debug_puts("\r\n");
 }
 
@@ -86,6 +100,18 @@ int main(void)
 		gpio_toggle(GPIOC, GPIO13);
 		delay_ms(100);
 		ds_step();
+		if (usart_get_flag(USART1, USART_SR_RXNE)) {
+			uint ch = usart_recv(USART1);
+			if (ch == 'B') {
+				bypass_active = 1;
+				gpio_set(GPIOC, GPIO15);	// opto-coupler
+				gpio_clear(GPIOC, GPIO14);	// LED
+			} else if (ch == 'b') {
+				bypass_active = 0;
+				gpio_clear(GPIOC, GPIO15);	// opto-coupler
+				gpio_set(GPIOC, GPIO14);	// LED
+			}
+		}
 		if (cycles++ >= 50) {
 			cycles = 0;
 			show_temperature();