Differences

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--- stm32:peripherals:gpio_alternate [2016/11/08 08:06] – feur
+++ stm32:peripherals:gpio_alternate [2022/12/28 08:20] (current) – ruan
@@ Line 13: / Line 13: @@
 Depending on the alternate function you have to configure the pins as:
-  * [[gpio_input|digital input]],
+  * [[gpio_input#programming_instructions|digital input]],
-  * [[gpio_output|digital output]] or
+  * [[gpio_output#programming_instructions|digital output]] or
-  * in [[gpio_analog|analgo input]].
+  * [[gpio_analog#programming_instructions|analog input]].
+\\
-==== Enable Peripheral ====
-Make sure the peripheral is enabled:
-  * Enable GPIOx in ''RCC->AHBENR[0]''.
-==== Setup input mode ====
-Configure the MODE and PUPDR register, for every pin that should act as digital input:
-  * Write ''0x00'' to the corresponding fields in ''GPIOx->MODE''.
-  * Configure pull-up / -down in ''GPIOx->PUPDR''.
 ===== Configuration Registers =====
-==== MODER ====
+==== GPIOx_MODER - Mode register ====
-Mode register
 \\ {{gpio_reg_common.svg}} \\ \\
 |< 100% 5em 5em >|
-|Pin x|11|Alternate function mode|
+|Pin x|10|Alternate function mode|
-==== AFRL/H ====
+==== GPIOx_AFRL/H - Alternate function register (low / high) ====
-Alternate function register (low / high)
 \\ {{gpio_reg_afrl.svg}} \\ \\
@@ Line 52: / Line 37: @@
 |:::|0011|AF3: Timer 8..11|
 |:::|0100|AF4: I²C 1..3|
-|:::|0101|AF5: SPI 1,2,4..6|
+|:::|0101|AF5: SPI 1..6|
-|:::|0110|AF6: SPI 3, SAI 1|
+|:::|0110|AF6: SPI 2/3, SAI 1|
-|:::|0111|AF7: USART 1..3, I²S 3 Ext|
+|:::|0111|AF7: SPI 3, USART 1..3|
-|:::|1000|AF8: UART 4..8|
+|:::|1000|AF8: USART 6, UART 4/5/7/8|
-|:::|1001|AF9: CAN 1..2, Timer 12..14|
+|:::|1001|AF9: CAN 1/2, Timer 12..14, LCD|
 |:::|1010|AF10: USB OTG HS/FS|
 |:::|1011|AF11: Ethernet|
-|:::|1100|AF12: FMC, USB OTG HS/FS, SDIO|
+|:::|1100|AF12: FMC, SDIO, USB OTG FS|
 |:::|1101|AF13: DCMI|
-|:::|1110|AF14: LTDC|
+|:::|1110|AF14: LCD|
 |:::|1111|AF15: Event Out|
-==== PUPDR ====
+==== GPIOx_PUPDR - GPIO port pull-up / pull-down register ====
-Push-up / pull-down register
 \\ {{gpio_reg_common.svg}} \\ \\
@@ Line 76: / Line 59: @@
 |:::|11|Reserved|
-==== OTYPER ====
+==== GPIOx_OTYPER - Port output type register ====
-Output type register
 \\ {{gpio_reg_otyper.svg}} \\ \\
@@ Line 86: / Line 67: @@
 |:::|1|Output type: open-drain|
-==== OSPEEDR ====
+==== GPIOx_OSPEEDR - Port output speed register ====
-Output speed register
 \\ {{gpio_reg_common.svg}} \\ \\
@@ Line 98: / Line 77: @@
 |:::|11|Speed: 100 MHz|
-===== Data Registers =====
-There are no data registers available in alternate function mode.
-\\ \\
-===== Legend =====
-\\ {{legende.svg}} \\ \\