From 9eef62547efdf8e18009b6d6d6b3f7c80bf64e13 Mon Sep 17 00:00:00 2001
From: jaseg <git@jaseg.net>
Date: Wed, 17 Apr 2019 16:32:43 +0900
Subject: center/fw: Add backchannel infrastructure

Untested!
---
 center_fw/8seg_protocol.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 center_fw/8seg_protocol.c

(limited to 'center_fw/8seg_protocol.c')

diff --git a/center_fw/8seg_protocol.c b/center_fw/8seg_protocol.c
new file mode 100644
index 0000000..0d0a2eb
--- /dev/null
+++ b/center_fw/8seg_protocol.c
@@ -0,0 +1,61 @@
+
+#include "global.h"
+#include "adc.h"
+#include "transmit.h"
+#include "8seg_protocol.h"
+
+struct cmd_if_struct {
+    struct command_if_def cmd_if;
+    int payload_len[PKT_TYPE_MAX];
+};
+
+const struct cmd_if_struct cmd_if = {{.packet_type_max=PKT_TYPE_MAX}, {
+    [PKT_TYPE_RESERVED] = 0,
+    [PKT_TYPE_SET_OUTPUTS_BINARY] = 1,
+    [PKT_TYPE_SET_GLOBAL_BRIGHTNESS] = 1,
+    [PKT_TYPE_SET_OUTPUTS] = 8,
+    [PKT_TYPE_GET_STATUS] = 0 }
+};
+
+volatile union {
+    struct status_tx status_tx;
+    uint8_t p[0];
+} tx_buf;
+
+void protocol_init() {
+	adc_configure_monitor_mode(&cmd_if.cmd_if, 20 /*us*/);
+    tx_init((uint8_t *)&tx_buf);
+}
+
+
+void handle_command(int command, uint8_t *args) {
+    static int global_brightness = 0xff;
+    switch (command) {
+        case PKT_TYPE_SET_OUTPUTS_BINARY:
+            set_outputs_binary(args[0], global_brightness);
+            break;
+
+        case PKT_TYPE_SET_GLOBAL_BRIGHTNESS:
+            global_brightness = args[0];
+            break;
+
+        case PKT_TYPE_SET_OUTPUTS:
+            set_outputs(args);
+            break;
+
+        case PKT_TYPE_GET_STATUS:
+            tx_buf.status_tx.temp_tenths_C = adc_data.temp_celsius_tenths;
+            tx_buf.status_tx.uptime_s = sys_time_seconds;
+            tx_buf.status_tx.decoding_error_cnt = decoding_error_cnt;
+            tx_buf.status_tx.protocol_error_cnt = protocol_error_cnt;
+            tx_buf.status_tx.vcc_mv = adc_data.vcc_mv;
+            tx_buf.status_tx.vin_mv = adc_data.mean_a_mv;
+            tx_buf.status_tx.vskew_mv = adc_data.mean_diff_mv;
+            tx_buf.status_tx.jitter_meas_avg_ns = jitter_meas_avg_ns;
+
+            /* Initialize transmission here, *after* all data has been copied to the buffer */
+            tx_transmit(sizeof(tx_buf.status_tx));
+            break;
+    }
+}
+
-- 
cgit