From 77cb71d45b38755ba4928fa3ed18fca018fadc16 Mon Sep 17 00:00:00 2001
From: Nathael Pajani <nathael.pajani@ed3l.fr>
Date: Mon, 11 Mar 2024 16:36:56 +0100
Subject: [PATCH] Update USB-UART communication, allow sending config and
 prepare for receiving new config over USB-UART link

---
 v10/comm.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++++-----
 v10/comm.h |  3 +++
 v10/main.c |  8 ++++++-
 3 files changed, 66 insertions(+), 6 deletions(-)

diff --git a/v10/comm.c b/v10/comm.c
index 6deb60d..8c2b7a8 100644
--- a/v10/comm.c
+++ b/v10/comm.c
@@ -39,14 +39,65 @@
 
 
 /***************************************************************************** */
+/* USB Uart */
+
+volatile uint8_t usb_logs = 0;
+volatile uint8_t usb_send_config = 0;
+
+enum comm_states {
+	Idle = 0, /* Waiting for next command */
+	Command,  /* Received command, waiting for command param */
+	Config, /* Received config command, receiving configuration */
+};
+
 /* Rx interrupt handler for system configuration over USB */
 void config_rx(uint8_t c)
 {
-	/* FAN control */
-	if (c == 'f') {
-		gpio_set(fan_ctrl);
-	} else {
-		gpio_clear(fan_ctrl);
+	static uint8_t comm_state = 0;
+
+	if (comm_state == Command) {
+		/* Handle command value */
+		comm_state = Idle;
+		return;
+	}
+
+	if (comm_state == Config) {
+		/* Receive new config */
+		/* Check received config checksum */
+		/* If config received, burn to flash and reset */
+		comm_state = Idle;
+		return;
+	}
+
+	/* Idle case */
+	switch (c) {
+		/* FAN control */
+		case 'F':
+			gpio_set(fan_ctrl);
+			break;
+		case 'f':
+			gpio_clear(fan_ctrl);
+			break;
+		/* Activate USB Logs */
+		case 'L':
+			usb_logs = 1;
+			break;
+		case 'l':
+			usb_logs = 0;
+			break;
+		/* Enter command mode */
+		case 'a':
+			comm_state = Command;
+			break;
+		/* Enter config mode */
+		case 'C':
+			comm_state = Config;
+			break;
+		/* Get config */
+		case 'g':
+			usb_send_config = 1;
+			break;
+		default:
 	}
 }
 
diff --git a/v10/comm.h b/v10/comm.h
index c1d35bb..6053cd3 100644
--- a/v10/comm.h
+++ b/v10/comm.h
@@ -25,6 +25,9 @@
 #include "data.h"
 
 /***************************************************************************** */
+extern volatile uint8_t usb_logs;
+extern volatile uint8_t usb_send_config;
+
 /* Rx interrupt handler for system configuration over USB */
 void config_rx(uint8_t c);
 
diff --git a/v10/main.c b/v10/main.c
index 4ab0d44..1fb55f4 100644
--- a/v10/main.c
+++ b/v10/main.c
@@ -650,7 +650,7 @@ int main(void)
 		slave_send_data();
 
 		/* Data Log */
-		if (1) {
+		if (usb_logs == 1) {
 			external_disable |= linky_test;
 			uprintf(UART0, "#%c:%d:%d:%d:%d:%d:%d:",
 							mode, loop++, solar_prod_value, home_conso_value,
@@ -665,6 +665,12 @@ int main(void)
 				msg = NULL;
 			}
 		}
+		if (usb_send_config == 1) {
+			char* conf = (char*)&sc_conf;
+			serial_write(UART0, "C", 1);
+			serial_write(UART0, conf, sizeof(struct scialys_config));
+			usb_send_config = 0;
+		}
 	}
 	return 0;
 }
-- 
2.43.0