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Add gpio_set_af to set alternative function of a pin

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This commit is contained in:
Alexander Heldt
2025-01-01 12:23:18 +01:00
parent 3f95f00852
commit 992b3c5b97
10 changed files with 549 additions and 335 deletions
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BIN
build/final.elf
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74
build/final.elf.map
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@@ -18,6 +18,8 @@ Discarded input sections
.text 0x00000000 0x0 build/gpio.o
.data 0x00000000 0x0 build/gpio.o
.bss 0x00000000 0x0 build/gpio.o
.text.gpio_set_af
0x00000000 0x98 build/gpio.o
.group 0x00000000 0xc build/main.o
.group 0x00000000 0xc build/main.o
.group 0x00000000 0xc build/main.o
@@ -261,38 +263,38 @@ LOAD build/timer.o
OUTPUT(build/final.elf elf32-littlearm)
LOAD linker stubs
.debug_info 0x00000000 0xb10
.debug_info 0x00000000 0x205 build/gpio.o
.debug_info 0x00000205 0x44e build/main.o
.debug_info 0x00000653 0x188 build/startup.o
.debug_info 0x000007db 0x335 build/timer.o
.debug_info 0x00000000 0xb6d
.debug_info 0x00000000 0x262 build/gpio.o
.debug_info 0x00000262 0x44e build/main.o
.debug_info 0x000006b0 0x188 build/startup.o
.debug_info 0x00000838 0x335 build/timer.o
.debug_abbrev 0x00000000 0x439
.debug_abbrev 0x00000000 0x119 build/gpio.o
.debug_abbrev 0x00000119 0x144 build/main.o
.debug_abbrev 0x0000025d 0x127 build/startup.o
.debug_abbrev 0x00000384 0xb5 build/timer.o
.debug_abbrev 0x00000000 0x43d
.debug_abbrev 0x00000000 0x11d build/gpio.o
.debug_abbrev 0x0000011d 0x144 build/main.o
.debug_abbrev 0x00000261 0x127 build/startup.o
.debug_abbrev 0x00000388 0xb5 build/timer.o
.debug_aranges 0x00000000 0xa8
.debug_aranges 0x00000000 0xb0
.debug_aranges
0x00000000 0x28 build/gpio.o
0x00000000 0x30 build/gpio.o
.debug_aranges
0x00000028 0x28 build/main.o
0x00000030 0x28 build/main.o
.debug_aranges
0x00000050 0x30 build/startup.o
0x00000058 0x30 build/startup.o
.debug_aranges
0x00000080 0x28 build/timer.o
0x00000088 0x28 build/timer.o
.debug_rnglists
0x00000000 0x6c
0x00000000 0x73
.debug_rnglists
0x00000000 0x19 build/gpio.o
0x00000000 0x20 build/gpio.o
.debug_rnglists
0x00000019 0x1b build/main.o
0x00000020 0x1b build/main.o
.debug_rnglists
0x00000034 0x1f build/startup.o
0x0000003b 0x1f build/startup.o
.debug_rnglists
0x00000053 0x19 build/timer.o
0x0000005a 0x19 build/timer.o
.debug_macro 0x00000000 0x3ba0
.debug_macro 0x00000000 0xb56 build/gpio.o
@@ -321,20 +323,20 @@ LOAD linker stubs
.debug_macro 0x00002f20 0xb5c build/timer.o
.debug_macro 0x00003a7c 0x124 build/timer.o
.debug_line 0x00000000 0x4b3
.debug_line 0x00000000 0x116 build/gpio.o
.debug_line 0x00000116 0x1d4 build/main.o
.debug_line 0x000002ea 0xea build/startup.o
.debug_line 0x000003d4 0xdf build/timer.o
.debug_line 0x00000000 0x516
.debug_line 0x00000000 0x179 build/gpio.o
.debug_line 0x00000179 0x1d4 build/main.o
.debug_line 0x0000034d 0xea build/startup.o
.debug_line 0x00000437 0xdf build/timer.o
.debug_str 0x00000000 0x5eba
.debug_str 0x00000000 0x5375 build/gpio.o
0x551d (size before relaxing)
.debug_str 0x00005375 0xab1 build/main.o
.debug_str 0x00000000 0x5ed0
.debug_str 0x00000000 0x538b build/gpio.o
0x553b (size before relaxing)
.debug_str 0x0000538b 0xab1 build/main.o
0x5f7e (size before relaxing)
.debug_str 0x00005e26 0x88 build/startup.o
.debug_str 0x00005e3c 0x88 build/startup.o
0x3cdc (size before relaxing)
.debug_str 0x00005eae 0xc build/timer.o
.debug_str 0x00005ec4 0xc build/timer.o
0x5b16 (size before relaxing)
.comment 0x00000000 0x45
@@ -370,8 +372,8 @@ LOAD linker stubs
0x00000278 0x8 build/timer.o
0x25b (size before relaxing)
.debug_frame 0x00000000 0x16c
.debug_frame 0x00000000 0x60 build/gpio.o
.debug_frame 0x00000060 0x50 build/main.o
.debug_frame 0x000000b0 0x6c build/startup.o
.debug_frame 0x0000011c 0x50 build/timer.o
.debug_frame 0x00000000 0x194
.debug_frame 0x00000000 0x88 build/gpio.o
.debug_frame 0x00000088 0x50 build/main.o
.debug_frame 0x000000d8 0x6c build/startup.o
.debug_frame 0x00000144 0x50 build/timer.o

769
build/gpio.S
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File diff suppressed because it is too large Load Diff

21
build/gpio.i
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@@ -2020,10 +2020,11 @@ typedef enum {
} GPIO_MODE;
void gpio_set_mode(uint16_t pin, GPIO_MODE mode);
void gpio_set_af(uint16_t pin, uint8_t af);
void gpio_write(uint16_t pin,
# 41 "src/gpio.h" 3 4
# 42 "src/gpio.h" 3 4
_Bool
# 41 "src/gpio.h"
# 42 "src/gpio.h"
val);
# 5 "src/gpio.c" 2
@@ -2034,10 +2035,22 @@ void gpio_set_mode(uint16_t pin, GPIO_MODE mode) {
gpio->MODER |= (mode & 0b11) << (pn * 2);
}
void gpio_set_af(uint16_t pin, uint8_t af) {
struct gpio *gpio = ((struct gpio*)(uintptr_t)((0x40020000U) + ((0x400U) * (pin >> 8))));
int pn = (pin & 0b1111);
if (pn < 8) {
gpio->AFRL &= ~(0b1111 << (pn * 4));
gpio->AFRL |= (af & 0b1111) << (pn * 4);
} else {
gpio->AFRH &= ~(0b1111 << (pn * 4));
gpio->AFRH |= (af & 0b1111) << (pn * 4);
}
}
void gpio_write(uint16_t pin,
# 13 "src/gpio.c" 3 4
# 25 "src/gpio.c" 3 4
_Bool
# 13 "src/gpio.c"
# 25 "src/gpio.c"
val) {
struct gpio *gpio = ((struct gpio*)(uintptr_t)((0x40020000U) + ((0x400U) * (pin >> 8))));
gpio->BSRR = (0b0011 << (pin & 0b1111)) << (val ? 0 : 16);

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build/gpio.o
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2
build/main.S
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@@ -824,7 +824,7 @@ main:
.byte 0
.uleb128 0xa
.4byte .LASF996
.byte 0x29
.byte 0x2a
.4byte 0x3cd
.uleb128 0x6
.4byte 0x88

5
build/main.i
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@@ -2144,10 +2144,11 @@ typedef enum {
} GPIO_MODE;
void gpio_set_mode(uint16_t pin, GPIO_MODE mode);
void gpio_set_af(uint16_t pin, uint8_t af);
void gpio_write(uint16_t pin,
# 41 "src/gpio.h" 3 4
# 42 "src/gpio.h" 3 4
_Bool
# 41 "src/gpio.h"
# 42 "src/gpio.h"
val);
# 6 "src/main.c" 2
# 1 "src/flash.h" 1

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build/main.o
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12
src/gpio.c
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@@ -10,6 +10,18 @@ void gpio_set_mode(uint16_t pin, GPIO_MODE mode) {
gpio->MODER |= (mode & 0b11) << (pn * 2); // Set new mode. Each pin uses 2 bits
}
void gpio_set_af(uint16_t pin, uint8_t af) {
struct gpio *gpio = GPIO(PINPORT(pin));
int pn = PINNUM(pin);
if (pn < 8) {
gpio->AFRL &= ~(0b1111 << (pn * 4)); // Each pin uses 4 bits
gpio->AFRL |= (af & 0b1111) << (pn * 4);
} else {
gpio->AFRH &= ~(0b1111 << (pn * 4)); // Each pin uses 4 bits
gpio->AFRH |= (af & 0b1111) << (pn * 4);
}
}
void gpio_write(uint16_t pin, bool val) {
struct gpio *gpio = GPIO(PINPORT(pin));
gpio->BSRR = (0b0011 << PINNUM(pin)) << (val ? 0 : 16);

1
src/gpio.h
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@@ -38,6 +38,7 @@ typedef enum {
} GPIO_MODE;
void gpio_set_mode(uint16_t pin, GPIO_MODE mode);
void gpio_set_af(uint16_t pin, uint8_t af);
void gpio_write(uint16_t pin, bool val);
#endif