Protab: More PWM

[home-hw.git] / aircon / README

diff --git a/aircon/README b/aircon/README
index 1c5a4967f44ade5bcfc2337dcf84a048be23290d..e5a5dabff6321357360a0c6e1bdf83a888f711b0 100644 (file)
--- a/aircon/README
+++ b/aircon/README
@@ -1,9 +1,10 @@
-
+Assignment of peripherals and pins
+==================================
 
 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
+TIM4   PWM: CH1 for fan control, CH2 for IR RC carrier
 
 USART1 debugging
 USART3 MODBUS
@@ -18,15 +19,15 @@ 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
+                       | PA1            PB7 |  TIM4 CH2 - IR LED*
+                       | PA2            PB6 |  TIM4 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
+MODBUS frame LED* (red)        | PB1           PA10 |  RXD1 - debugging console
 TXD3 - RS485           | PB10           PA9 |  TXD1 - debugging console
 RXD3 - RS485           | PB11           PA8 |
                        | RESET         PB15 |
@@ -36,14 +37,17 @@ RXD3 - RS485                | PB11           PA8 |
                        +--------------------+
 
 Interface connector
+===================
+
+       (this side to PCB edge)
 
        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
+
+       (this side to BluePill)