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authorJosh Rahm <joshuarahm@gmail.com>2018-01-23 23:14:31 -0700
committerJosh Rahm <joshuarahm@gmail.com>2018-01-23 23:14:31 -0700
commit7aa10db46c13ad8adc88aadff39b8cf6b15db09d (patch)
treeb1e34a6703de33250b0bd97d34999b687a36a00f /usart/src/gpio.c
parentacd8afd83da625d36ef39bc01717f29f3b689952 (diff)
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rename folders to give notion of progression
Diffstat (limited to 'usart/src/gpio.c')
-rw-r--r--usart/src/gpio.c52
1 files changed, 0 insertions, 52 deletions
diff --git a/usart/src/gpio.c b/usart/src/gpio.c
deleted file mode 100644
index 02933b7..0000000
--- a/usart/src/gpio.c
+++ /dev/null
@@ -1,52 +0,0 @@
-#include "gpio.h"
-#include "rcc.h"
-
-/*
- * Sets the mode of a pin on a gpio por.
- */
-void set_gpio_pin_mode(
- __IO gpio_port_t* gpio_port, gpio_pin_t pin, gpio_pin_mode_t mode)
-{
- /* Each pin has a 2-bit mode provided at bits pin#*2 and pin#*2+1 */
- gpio_port->mode_r &= ~(0x03 << pin * 2);
- gpio_port->mode_r |= mode << pin * 2;
-}
-
-gpio_output_pin_t set_gpio_pin_output(
- __IO gpio_port_t* gpio_port, gpio_pin_t pin)
-{
- set_gpio_pin_mode(gpio_port, pin, MODE_OUTPUT);
-
- return (gpio_output_pin_t){.gpio_port = gpio_port, .pin = pin};
-}
-
-void set_gpio_output_pin(gpio_output_pin_t pin, bool onoff)
-{
- if (onoff) {
- pin.gpio_port->output_r |= 1 << pin.pin;
- } else {
- pin.gpio_port->output_r &= ~(1 << pin.pin);
- }
-}
-
-void set_gpio_alternate_function(
- __IO gpio_port_t* port, gpio_pin_t gpio_pin, alternate_function_t afn)
-{
- __IO uint32_t* reg;
- if (gpio_pin < 8) {
- reg = &(port->af_rl);
- } else {
- reg = &(port->af_rh);
- gpio_pin -= 8;
- }
-
- uint32_t tmp = *reg & (~0x0f << gpio_pin * 4);
- *reg = tmp | (afn << gpio_pin * 4);
-}
-
-#define GPIO_PORTS_BASE_ADDR ((uint8_t*)0x48000000)
-__IO gpio_port_t* enable_gpio(gpio_port_number_t gpio_port_number)
-{
- RCC.ahb2en_r |= 1 << gpio_port_number; /* Enable the GPIO port. */
- return (__IO gpio_port_t*)(GPIO_PORTS_BASE_ADDR + (gpio_port_number * 0x400));
-}