From fd9f62cf5cfec28328da416cd17c3e03dccf03bc Mon Sep 17 00:00:00 2001 From: Martin Mares Date: Sun, 14 Jul 2019 01:01:44 +0200 Subject: [PATCH] Aircon: README --- aircon/README | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 aircon/README diff --git a/aircon/README b/aircon/README new file mode 100644 index 0000000..1c5a496 --- /dev/null +++ b/aircon/README @@ -0,0 +1,49 @@ + + +TIM1 timing of IR remote control +TIM2 MODBUS timing +TIM3 DS18B20 one-wire bus timing: CH1 drives DMA1, CH2 drives the line +TIM5 PWM: CH1 for fan control, CH2 for IR RC carrier + +USART1 debugging +USART3 MODBUS + +DMA1 DS18B20 one-wire bus sampling + + + Blue Pill pinout + +--------------------+ + | VBATT 3.3V | +BluePill LED | PC13 GND | + | PC14 5V | +bypass opto-coupler | PC15 PB9 | + | PA0 PB8 | + | PA1 PB7 | TIM3 CH2 - IR LED* + | PA2 PB6 | TIM3 CH1 - fan control opto-coupler + | PA3 PB5 | + | PA4 PB4 | + | PA5 PB3 | +RS485 TX enable | PA6 PA15 | +TIM3_CH2 - DS18B20 bus | PA7 PA12 | +bypass LED* (green) | PB0 PA11 | +RC active LED* (red) | PB1 PA10 | RXD1 - debugging console +TXD3 - RS485 | PB10 PA9 | TXD1 - debugging console +RXD3 - RS485 | PB11 PA8 | + | RESET PB15 | + | 3.3 V PB14 | + | GND PB13 | + | GND PB12 | + +--------------------+ + +Interface connector + + heat exchanger +24V + heat exchanger GND + heat exchanger bypass servo + heat exchanger fan control (IN1) + - + - + - + temperature sensors VCC + temperature sensors GND + temperature sensors data bus -- 2.39.2