From aaa6dd8a94a0a9c7686e7299960088ed53018acb Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Thu, 13 Jul 2023 16:30:22 +0200
Subject: [PATCH] =?utf8?q?test-sinclair:=20Dek=C3=B3dov=C3=A1n=C3=AD=20?=
 =?utf8?q?=C4=8D=C3=ADslic?=
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---
 test-sinclair/main.c | 90 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 86 insertions(+), 4 deletions(-)

diff --git a/test-sinclair/main.c b/test-sinclair/main.c
index 07c0d7d..753bcfd 100644
--- a/test-sinclair/main.c
+++ b/test-sinclair/main.c
@@ -150,18 +150,70 @@ static void tm_init(void)
 	nvic_enable_irq(NVIC_TIM3_IRQ);
 }
 
+/*
+ *  Data memory of TM1618:
+ *
+ *  [0]    .    .    .    -    -    -    -    -
+ *  [1]    .    .    -    -    HEAT .    .    .
+ *  [2]    .    .    .    DRY  -    SLP  MED  LOW
+ *  [3]    .    .    HIGH AUTO COOL .    .    .
+ *  [4]    .    .    .    B2   -    G2   D2   C2
+ *  [5]    .    .    E2   F2   A2   .    .    .
+ *  [6]    .    .    .    B1   -    G1   D1   C1
+ *  [7]    .    .    E1   F1   A1   .    .    .
+ *
+ *  "." is an always-zero bit not defined by TM1618, "-" is defined, but not used by AC.
+ */
 static volatile byte tm_data[8];
-static volatile byte tm_overrun;
+static volatile uint tm_overruns;
 
 static volatile byte tm_buffer[256];
 static volatile uint tm_len;
 
+/*
+ *
+ *  Display segments:
+ *
+ *      +--A--+
+ *      |     |
+ *      F     B
+ *      |     |
+ *      +--G--+
+ *      |     |
+ *      E     C
+ *      |     |
+ *      +--D--+
+ */
+
+enum tm_seg {
+	SEGa = 0x0800,
+	SEGb = 0x0010,
+	SEGc = 0x0001,
+	SEGd = 0x0002,
+	SEGe = 0x2000,
+	SEGf = 0x1000,
+	SEGg = 0x0004,
+};
+
+static const u16 tm_digits[10] = {
+	[0] = SEGa | SEGb | SEGc | SEGd | SEGe | SEGf,
+	[1] = SEGb | SEGc,
+	[2] = SEGa | SEGb | SEGd | SEGe | SEGg,
+	[3] = SEGa | SEGb | SEGc | SEGd | SEGg,
+	[4] = SEGb | SEGc | SEGf | SEGg,
+	[5] = SEGa | SEGc | SEGd | SEGf | SEGg,
+	[6] = SEGa | SEGc | SEGd | SEGe | SEGf | SEGg,
+	[7] = SEGa | SEGb | SEGc,
+	[8] = SEGa | SEGb | SEGc | SEGd | SEGe | SEGf | SEGg,
+	[9] = SEGa | SEGb | SEGc | SEGd | SEGf | SEGg,
+};
+
 static volatile uint tm_timeouts;
 
 void spi2_isr(void)
 {
 	if (SPI_SR(SPI2) & SPI_SR_OVR)
-		tm_overrun = 1;
+		tm_overruns++;
 	if (SPI_SR(SPI2) & SPI_SR_RXNE) {
 		byte x = SPI_DR(SPI2) ^ 0xff;
 #if 0
@@ -196,8 +248,38 @@ static void tm_show(void)
 	debug_printf("TM:");
 	for (uint i=0; i<8; i++)
 		debug_printf(" %02x", tm_data[i]);
-	debug_printf(" o=%d t=%d", tm_overrun, tm_timeouts);
-	tm_overrun = 0;
+	debug_printf(" o=%d t=%d", tm_overruns, tm_timeouts);
+
+	debug_printf(" =>");
+	if (tm_data[1] & 0x08)
+		debug_printf(" HEAT");
+	if (tm_data[2] & 0x10)
+		debug_printf(" DRY");
+	if (tm_data[2] & 0x04)
+		debug_printf(" SLEEP");
+	if (tm_data[2] & 0x02)
+		debug_printf(" MED");
+	if (tm_data[2] & 0x01)
+		debug_printf(" LOW");
+	if (tm_data[3] & 0x20)
+		debug_printf(" HIGH");
+	if (tm_data[3] & 0x10)
+		debug_printf(" AUTO");
+	if (tm_data[3] & 0x08)
+		debug_printf(" COOL");
+
+	debug_putc(' ');
+	for (int i=0; i<2; i++) {
+		uint x = (tm_data[7-2*i] << 8) | tm_data[6-2*i];
+		uint j = 0;
+		while (j < 10 && tm_digits[j] != x)
+			j++;
+		if (j == 10)
+			debug_putc('?');
+		else
+			debug_putc('0' + j);
+	}
+
 	debug_putc('\n');
 
 #if 0
-- 
2.39.2