fix minor compile time bug and update docs

Author: mcudev

README.md

@@ -28,6 +28,7 @@ cd trezor-core
 sudo dpkg --add-architecture i386
 sudo apt-get update
 sudo apt-get install scons libsdl2-dev:i386 libsdl2-image-dev:i386 gcc-multilib
+pip install ed25519 pyblake2
 make build_unix
 ```
 

docs/hardware.md

@@ -19,10 +19,9 @@ TODO
 
 ## Developer Kit
 
-* 1 x [Waveshare Core405R Dev Board](http://www.waveshare.com/core405r.htm)
+* 1 x [STM32F407G-DISC1](http://www.st.com/en/evaluation-tools/stm32f4discovery.html)
 * 1 x USB Cable Type A Plug/Male to Type Mini-B Plug/Male
-* 1 x ST-LINK V2 STM32 USB Debug Adapter
-* Female to female jumper wires with 0.1" header contacts
+* 1 x USB Cable Type A Plug/Male to Type Micro-B Plug/Male
 * 1 x Display
 * 1 x Capacitive Touch Panel / Sensor
 * 1 x microSD Socket
@@ -38,27 +37,27 @@ TODO
 
 ##### Pinout
 
-|Description|MCU Pin|
-|-----------|-------|
-|LCD_RST|PC14|
-|LCD_FMARK|PD12 [TODO: what is this for?]|
-|LCD_PWM|PB13 [TODO: what is this for?]|
-|LCD_CS|PD7|
-|LCD_RS|PD11|
-|LCD_RD|PD4|
-|LCD_WR|PD5|
-|LCD_D0|PD14|
-|LCD_D1|PD15|
-|LCD_D2|PD0|
-|LCD_D3|PD1|
-|LCD_D4|PE7|
-|LCD_D5|PE8|
-|LCD_D6|PE9|
-|LCD_D7|PE10|
+|Description|MCU Pin|Notes|
+|-----------|-------|-----|
+|LCD_RST|PC14||
+|LCD_FMARK|PD12|tearing effect input|
+|LCD_PWM|PB13|backlight control (brightness)|
+|LCD_CS|PD7||
+|LCD_RS|PD11|register select aka command/data|
+|LCD_RD|PD4||
+|LCD_WR|PD5||
+|LCD_D0|PD14||
+|LCD_D1|PD15||
+|LCD_D2|PD0||
+|LCD_D3|PD1||
+|LCD_D4|PE7||
+|LCD_D5|PE8||
+|LCD_D6|PE9||
+|LCD_D7|PE10||
 
 #### Capacitive Touch Panel / Sensor
 * Bus/Interface: I2C
-* Driver IC: FT6206 [TODO: does this matter]
+* Driver IC: FT6206 [TODO: does this matter?]
 * single touch
 
 ##### Pinout
@@ -97,6 +96,7 @@ TODO
 
 #### Dev Board
 * [Schematic](http://www.waveshare.com/w/upload/0/05/CorexxxR-Schematic.pdf)
-* [STM32F405RGT6](http://www.st.com/en/microcontrollers/stm32f405rg.html)
+* [STM32F407VGT6](http://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32-high-performance-mcus/stm32f4-series/stm32f407-417/stm32f407vg.html)
 * HSE / High-Speed External Crystal: 8 MHz
+* Integrated STMicroelectronics ST-LINK/V2.1 debugger
 

embed/extmod/modtrezorui/display-stm32.h

@@ -134,14 +134,14 @@ int display_init(void) {
     HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
     HAL_GPIO_WritePin(GPIOC, GPIO_PIN_14, GPIO_PIN_SET);
 
-    // LCD_FMARK/PD12
+    // LCD_FMARK/PD12 (tearing effect)
     GPIO_InitStructure.Pin = GPIO_PIN_12;
     GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
     GPIO_InitStructure.Pull = GPIO_NOPULL;
     GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
     HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
 
-    // LCD_PWM/PB13
+    // LCD_PWM/PB13 (backlight control)
     GPIO_InitStructure.Mode      = GPIO_MODE_AF_PP;
     GPIO_InitStructure.Pull      = GPIO_NOPULL;
     GPIO_InitStructure.Speed     = GPIO_SPEED_FREQ_VERY_HIGH;
@@ -224,7 +224,7 @@ int display_init(void) {
     CMD(0x01);                                      // software reset
     HAL_Delay(20);
     CMD(0x28);                                      // display off
-    CMD(0xCF); DATA(0x00); DATA(0xC1); DATA(0x30;
+    CMD(0xCF); DATA(0x00); DATA(0xC1); DATA(0x30);
     CMD(0xED); DATA(0x64); DATA(0x03); DATA(0x12); DATA(0x81);
     CMD(0xE8); DATA(0x85); DATA(0x10); DATA(0x7A);
     CMD(0xCB); DATA(0x39); DATA(0x2C); DATA(0x00); DATA(0x34); DATA(0x02);
@@ -288,6 +288,7 @@ static void display_set_window(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y
 }
 
 void display_refresh(void) {
+    // synchronize with the panel synchronization signal in order to avoid visual tearing effects
     while (GPIO_PIN_RESET == HAL_GPIO_ReadPin(GPIOD, GPIO_PIN_12)) { }
     while (GPIO_PIN_SET == HAL_GPIO_ReadPin(GPIOD, GPIO_PIN_12)) { }
 }