stm32/boards: Add STM32L432KC chip configuration files.

The pin alternate function information is derived from ST's datasheet
https://www.st.com/resource/en/datasheet/stm32l432kc.pdf
In the datasheet, the line 2 of AF4 includes I2C2 but actually the chip
does not have I2C2 so it is removed.

2 files changed, 55 insertions, 0 deletions

diff --git a/ports/stm32/boards/stm32l432.ld b/ports/stm32/boards/stm32l432.ld
new file mode 100644
index 000000000..70956c95b
--- /dev/null
+++ b/ports/stm32/boards/stm32l432.ld
@@ -0,0 +1,27 @@
+/*
+    GNU linker script for STM32L432KC
+*/
+
+/* Specify the memory areas */
+MEMORY
+{
+    FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 256K
+    FLASH_TEXT (rx) : ORIGIN = 0x08000000, LENGTH = 256K
+    RAM (xrw)       : ORIGIN = 0x20000000, LENGTH = 48K
+    SRAM2 (xrw)     : ORIGIN = 0x10000000, LENGTH = 16K
+}
+
+/* produce a link error if there is not this amount of RAM for these sections */
+_minimum_stack_size = 2K;
+_minimum_heap_size = 16K;
+
+/* Define the top end of the stack.  The stack is full descending so begins just
+   above last byte of RAM.  Note that EABI requires the stack to be 8-byte
+   aligned for a call. */
+_estack = ORIGIN(RAM) + LENGTH(RAM);
+
+/* RAM extents for the garbage collector */
+_ram_start = ORIGIN(RAM);
+_ram_end = ORIGIN(RAM) + LENGTH(RAM);
+_heap_start = _ebss; /* heap starts just after statically allocated memory */
+_heap_end = 0x2000A800; /* room for a 6k stack */
diff --git a/ports/stm32/boards/stm32l432_af.csv b/ports/stm32/boards/stm32l432_af.csv
new file mode 100644
index 000000000..e1d231c40
--- /dev/null
+++ b/ports/stm32/boards/stm32l432_af.csv
@@ -0,0 +1,28 @@
+Port,,AF0,AF1,AF2,AF3,AF4,AF5,AF6,AF7,AF8,AF9,AF10,AF11,AF12,AF13,AF14,AF15,,,
+,,SYS_AF,TIM1/TIM2/LPTIM1,TIM1/TIM2,USART2,I2C1/I2C2/I2C3,SPI1/SPI2,SPI3,USART1/USART2/USART3,LPUART1,CAN1/TSC,USB/QUADSPI,,COMP1/COMP2/SWPMI1,SAI1,TIM2/TIM15/TIM16/LPTIM2,EVENTOUT,ADC,COMP,DAC
+PortA,PA0,,TIM2_CH1,,,,,,USART2_CTS,,,,,COMP1_OUT,SAI1_EXTCLK,TIM2_ETR,EVENTOUT,ADC1_IN5,COMP1_INM,
+PortA,PA1,,TIM2_CH2,,,I2C1_SMBA,SPI1_SCK,,USART2_RTS/USART2_DE,,,,,,,TIM15_CH1N,EVENTOUT,ADC1_IN6,COMP1_INP,
+PortA,PA2,,TIM2_CH3,,,,,,USART2_TX,LPUART1_TX,,QUADSPI_BK1_NCS,,COMP2_OUT,,TIM15_CH1,EVENTOUT,ADC1_IN7,COMP2_INM,
+PortA,PA3,,TIM2_CH4,,,,,,USART2_RX,LPUART1_RX,,QUADSPI_CLK,,,SAI1_MCLK_A,TIM15_CH2,EVENTOUT,ADC1_IN8,COMP2_INP,
+PortA,PA4,,,,,,SPI1_NSS,SPI3_NSS,USART2_CK,,,,,,SAI1_FS_B,LPTIM2_OUT,EVENTOUT,ADC1_IN9,COMP1_INM/COMP2_INM,DAC1_OUT1
+PortA,PA5,,TIM2_CH1,TIM2_ETR,,,SPI1_SCK,,,,,,,,,LPTIM2_ETR,EVENTOUT,ADC1_IN10,COMP1_INM/COMP2_INM,DAC1_OUT2
+PortA,PA6,,TIM1_BKIN,,,,SPI1_MISO,COMP1_OUT,USART3_CTS,,,QUADSPI_BK1_IO3,,TIM1_BKIN_COMP2,,TIM16_CH1,EVENTOUT,ADC1_IN11,,
+PortA,PA7,,TIM1_CH1N,,,I2C3_SCL,SPI1_MOSI,,,,,QUADSPI_BK1_IO2,,COMP2_OUT,,,EVENTOUT,ADC1_IN12,,
+PortA,PA8,MCO,TIM1_CH1,,,,,,USART1_CK,,,,,SWPMI1_IO,SAI1_SCLK_A,LPTIM2_OUT,EVENTOUT,,,
+PortA,PA9,,TIM1_CH2,,,I2C1_SCL,,,USART1_TX,,,,,,SAI1_FS_A,TIM15_BKIN,EVENTOUT,,,
+PortA,PA10,,TIM1_CH3,,,I2C1_SDA,,,USART1_RX,,,USB_CRS_SYNC,,,SAI1_SD_A,,EVENTOUT,,,
+PortA,PA11,,TIM1_CH4,TIM1_BKIN2,,,SPI1_MISO,COMP1_OUT,USART1_CTS,,CAN1_RX,USB_DM,,TIM1_BKIN2_COMP1,,,EVENTOUT,,,
+PortA,PA12,,TIM1_ETR,,,,SPI1_MOSI,,USART1_RTS/USART1_DE,,CAN1_TX,USB_DP,,,,,EVENTOUT,,,
+PortA,PA13,JTMS/SWDIO,IR_OUT,,,,,,,,,USB_NOE,,SWPMI1_TX,,,EVENTOUT,,,
+PortA,PA14,JTCK/SWCLK,LPTIM1_OUT,,,I2C1_SMBA,,,,,,,,SWPMI1_RX,SAI1_SD_B,,EVENTOUT,,,
+PortA,PA15,JTDI,TIM2_CH1,TIM2_ETR,USART2_RX,,SPI1_NSS,SPI3_NSS,USART3_RTS/USART3_DE,,TSC_G3_IO1,,,SWPMI1_SUSPEND,SAI1_FS_B,,EVENTOUT,,,
+PortB,PB0,,TIM1_CH2N,,,,SPI1_NSS,,USART3_CK,,,QUADSPI_BK1_IO1,,COMP1_OUT,SA1_EXTCLK,,EVENTOUT,ADC1_IN15,,
+PortB,PB1,,TIM1_CH3N,,,,,,USART3_RTS/USART3_DE,LPUART1_RTS/LPUART1_DE,,QUADSPI_BK1_IO0,,,,LPTIM2_IN1,EVENTOUT,ADC1_IN16,COMP1_INM,
+PortB,PB3,JTDO/TRACESWO,TIM2_CH2,,,,SPI1_SCK,SPI3_SCK,USART1_RTS/USART1_DE,,,,,,SAI1_SCK_B,,EVENTOUT,,COMP2_INM,
+PortB,PB4,NJTRST,,,,I2C3_SDA,SPI1_MISO,SPI3_MISO,USART1_CTS,,TSC_G2_IO1,,,,SAI1_MCLK_B,,EVENTOUT,,COMP2_INP,
+PortB,PB5,,LPTIM1_IN1,,,I2C1_SMBA,SPI1_MOSI,SPI3_MOSI,USART1_CK,,TSC_G2_IO2,,,COMP2_OUT,SAI1_SD_B,TIM16_BKIN,EVENTOUT,,,
+PortB,PB6,,LPTIM1_ETR,,,I2C1_SCL,,,USART1_TX,,TSC_G2_IO3,,,,SAI1_FS_B,TIM16_CH1N,EVENTOUT,,COMP2_INP,
+PortB,PB7,,LPTIM1_IN2,,,I2C1_SDA,,,USART1_RX,,TSC_G2_IO4,,,,,,EVENTOUT,,COMP2_INM,
+PortC,PC14,,,,,,,,,,,,,,,,EVENTOUT,,,
+PortC,PC15,,,,,,,,,,,,,,,,EVENTOUT,,,
+PortH,PH3,,,,,,,,,,,,,,,,EVENTOUT,,,
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