#include <sys/types.h>
#include <unistd.h>
#include <sys/ioctl.h>
-#include "Gayle.h"
-#include "ide.h"
#include "m68k.h"
#include "main.h"
-#include "config_file/config_file.h"
+#include "platforms/platforms.h"
#include "input/input.h"
-//#define BCM2708_PERI_BASE 0x20000000 //pi0-1
-//#define BCM2708_PERI_BASE 0xFE000000 //pi4
-#define BCM2708_PERI_BASE 0x3F000000 // pi3
-#define BCM2708_PERI_SIZE 0x01000000
-#define GPIO_BASE (BCM2708_PERI_BASE + 0x200000) /* GPIO controller */
-#define GPCLK_BASE (BCM2708_PERI_BASE + 0x101000)
-#define GPIO_ADDR 0x200000 /* GPIO controller */
-#define GPCLK_ADDR 0x101000
-#define CLK_PASSWD 0x5a000000
-#define CLK_GP0_CTL 0x070
-#define CLK_GP0_DIV 0x074
-
-#define SA0 5
-#define SA1 3
-#define SA2 2
-
-#define STATUSREGADDR \
- GPIO_CLR = 1 << SA0; \
- GPIO_CLR = 1 << SA1; \
- GPIO_SET = 1 << SA2;
-#define W16 \
- GPIO_CLR = 1 << SA0; \
- GPIO_CLR = 1 << SA1; \
- GPIO_CLR = 1 << SA2;
-#define R16 \
- GPIO_SET = 1 << SA0; \
- GPIO_CLR = 1 << SA1; \
- GPIO_CLR = 1 << SA2;
-#define W8 \
- GPIO_CLR = 1 << SA0; \
- GPIO_SET = 1 << SA1; \
- GPIO_CLR = 1 << SA2;
-#define R8 \
- GPIO_SET = 1 << SA0; \
- GPIO_SET = 1 << SA1; \
- GPIO_CLR = 1 << SA2;
-
-#define PAGE_SIZE (4 * 1024)
-#define BLOCK_SIZE (4 * 1024)
-
-#define GPIOSET(no, ishigh) \
- do { \
- if (ishigh) \
- set |= (1 << (no)); \
- else \
- reset |= (1 << (no)); \
- } while (0)
-
-#define FASTBASE 0x07FFFFFF
-#define FASTSIZE 0xFFFFFFF
-#define GAYLEBASE 0xD80000 // D7FFFF
-#define GAYLESIZE 0x6FFFF
-
-#define JOY0DAT 0xDFF00A
-#define JOY1DAT 0xDFF00C
-#define CIAAPRA 0xBFE001
-#define POTGOR 0xDFF016
+#include "platforms/amiga/Gayle.h"
+#include "platforms/amiga/gayle-ide/ide.h"
+#include "platforms/amiga/amiga-registers.h"
+#include "gpio/gpio.h"
int kb_hook_enabled = 0;
int mouse_hook_enabled = 0;
char mouse_dx = 0, mouse_dy = 0;
char mouse_buttons = 0;
+extern volatile unsigned int *gpio;
+extern volatile uint16_t srdata;
+
#define KICKBASE 0xF80000
#define KICKSIZE 0x7FFFF
-int mem_fd, mouse_fd = -1;
+int mem_fd, mouse_fd = -1, keyboard_fd = -1;
int mem_fd_gpclk;
int gayle_emulation_enabled = 1;
-void *gpio_map;
-void *gpclk_map;
// Configurable emulator options
unsigned int cpu_type = M68K_CPU_TYPE_68000;
unsigned int loop_cycles = 300;
struct emulator_config *cfg = NULL;
-
-// I/O access
-volatile unsigned int *gpio;
-volatile unsigned int *gpclk;
-volatile unsigned int gpfsel0;
-volatile unsigned int gpfsel1;
-volatile unsigned int gpfsel2;
-volatile unsigned int gpfsel0_o;
-volatile unsigned int gpfsel1_o;
-volatile unsigned int gpfsel2_o;
-
-// GPIO setup macros. Always use INP_GPIO(x) before using OUT_GPIO(x) or
-// SET_GPIO_ALT(x,y)
-#define INP_GPIO(g) *(gpio + ((g) / 10)) &= ~(7 << (((g) % 10) * 3))
-#define OUT_GPIO(g) *(gpio + ((g) / 10)) |= (1 << (((g) % 10) * 3))
-#define SET_GPIO_ALT(g, a) \
- *(gpio + (((g) / 10))) |= \
- (((a) <= 3 ? (a) + 4 : (a) == 4 ? 3 : 2) << (((g) % 10) * 3))
-
-#define GPIO_SET \
- *(gpio + 7) // sets bits which are 1 ignores bits which are 0
-#define GPIO_CLR \
- *(gpio + 10) // clears bits which are 1 ignores bits which are 0
-
-#define GET_GPIO(g) (*(gpio + 13) & (1 << g)) // 0 if LOW, (1<<g) if HIGH
-
-#define GPIO_PULL *(gpio + 37) // Pull up/pull down
-#define GPIO_PULLCLK0 *(gpio + 38) // Pull up/pull down clock
-
-void setup_io();
-
-uint32_t read8(uint32_t address);
-void write8(uint32_t address, uint32_t data);
-
-uint32_t read16(uint32_t address);
-void write16(uint32_t address, uint32_t data);
-
-void write32(uint32_t address, uint32_t data);
-uint32_t read32(uint32_t address);
-
-uint16_t read_reg(void);
-void write_reg(unsigned int value);
-
-volatile uint16_t srdata;
-volatile uint32_t srdata2;
-volatile uint32_t srdata2_old;
+char keyboard_file[256] = "/dev/input/event0";
//unsigned char g_kick[524288];
//unsigned char g_ram[FASTSIZE + 1]; /* RAM */
-unsigned char toggle;
-static volatile unsigned char ovl;
+int ovl;
static volatile unsigned char maprom;
void sigint_handler(int sig_num) {
if (mem_fd)
close(mem_fd);
- exit(0);
-}
-
-void *iplThread(void *args) {
- printf("IPL thread running/n");
-
- while (42) {
-
- if (GET_GPIO(1) == 0) {
- toggle = 1;
- m68k_end_timeslice();
- //printf("thread!/n");
- } else {
- toggle = 0;
- };
- usleep(1);
+ if (cfg->platform->shutdown) {
+ cfg->platform->shutdown(cfg);
}
+ exit(0);
}
int main(int argc, char *argv[]) {
cfg = load_config_file(argv[g]);
}
}
+ else if (strcmp(argv[g], "--keyboard-file") == 0 || strcmp(argv[g], "--kbfile") == 0) {
+ if (g + 1 >= argc) {
+ printf("%s switch found, but no keyboard device path specified.\n", argv[g]);
+ } else {
+ g++;
+ strcpy(keyboard_file, argv[g]);
+ }
+ }
}
if (!cfg) {
if (cfg) {
if (cfg->cpu_type) cpu_type = cfg->cpu_type;
if (cfg->loop_cycles) loop_cycles = cfg->loop_cycles;
+
+ if (!cfg->platform)
+ cfg->platform = make_platform_config("none", "generic");
+ cfg->platform->platform_initial_setup(cfg);
}
if (cfg->mouse_enabled) {
}
}
+ keyboard_fd = open(keyboard_file, O_RDONLY | O_NONBLOCK);
+ if (keyboard_fd == -1) {
+ printf("Failed to open keyboard event source.\n");
+ }
+
sched_setscheduler(0, SCHED_FIFO, &priority);
mlockall(MCL_CURRENT); // lock in memory to keep us from paging out
// Enable 200MHz CLK output on GPIO4, adjust divider and pll source depending
// on pi model
printf("Enable 200MHz GPCLK0 on GPIO4\n");
-
- *(gpclk + (CLK_GP0_CTL / 4)) = CLK_PASSWD | (1 << 5);
- usleep(10);
- while ((*(gpclk + (CLK_GP0_CTL / 4))) & (1 << 7))
- ;
- usleep(100);
- *(gpclk + (CLK_GP0_DIV / 4)) =
- CLK_PASSWD | (6 << 12); // divider , 6=200MHz on pi3
- usleep(10);
- *(gpclk + (CLK_GP0_CTL / 4)) =
- CLK_PASSWD | 5 | (1 << 4); // pll? 6=plld, 5=pllc
- usleep(10);
- while (((*(gpclk + (CLK_GP0_CTL / 4))) & (1 << 7)) == 0)
- ;
- usleep(100);
-
- SET_GPIO_ALT(4, 0); // gpclk0
-
- // set SA to output
- INP_GPIO(2);
- OUT_GPIO(2);
- INP_GPIO(3);
- OUT_GPIO(3);
- INP_GPIO(5);
- OUT_GPIO(5);
-
- // set gpio0 (aux0) and gpio1 (aux1) to input
- INP_GPIO(0);
- INP_GPIO(1);
-
- // Set GPIO pins 6,7 and 8-23 to output
- for (g = 6; g <= 23; g++) {
- INP_GPIO(g);
- OUT_GPIO(g);
- }
- printf("Precalculate GPIO8-23 as Output\n");
- gpfsel0_o = *(gpio); // store gpio ddr
- printf("gpfsel0: %#x\n", gpfsel0_o);
- gpfsel1_o = *(gpio + 1); // store gpio ddr
- printf("gpfsel1: %#x\n", gpfsel1_o);
- gpfsel2_o = *(gpio + 2); // store gpio ddr
- printf("gpfsel2: %#x\n", gpfsel2_o);
-
- // Set GPIO pins 8-23 to input
- for (g = 8; g <= 23; g++) {
- INP_GPIO(g);
- }
- printf("Precalculate GPIO8-23 as Input\n");
- gpfsel0 = *(gpio); // store gpio ddr
- printf("gpfsel0: %#x\n", gpfsel0);
- gpfsel1 = *(gpio + 1); // store gpio ddr
- printf("gpfsel1: %#x\n", gpfsel1);
- gpfsel2 = *(gpio + 2); // store gpio ddr
- printf("gpfsel2: %#x\n", gpfsel2);
-
- GPIO_CLR = 1 << 2;
- GPIO_CLR = 1 << 3;
- GPIO_SET = 1 << 5;
-
- GPIO_SET = 1 << 6;
- GPIO_SET = 1 << 7;
+ gpio_enable_200mhz();
// reset cpld statemachine first
m68k_set_reg(M68K_REG_PC, 0x0);
}
-/*
- pthread_t id;
- int err;
- err = pthread_create(&id, NULL, &iplThread, NULL);
- if (err != 0)
- printf("\ncan't create IPL thread :[%s]", strerror(err));
- else
- printf("\n IPL Thread created successfully\n");
-*/
+ char c = 0;
m68k_pulse_reset();
while (42) {
m68k_execute(loop_cycles);
// FIXME: Rework this to use keyboard events instead.
- /*while (kbhit()) {
- char c = getchar();
+ /*while (get_key_char(&c)) {
if (c == cfg->keyboard_toggle_key && !kb_hook_enabled) {
kb_hook_enabled = 1;
printf("Keyboard hook enabled.\n");
kb_hook_enabled = 0;
printf("Keyboard hook disabled.\n");
}
- if (c == cfg->mouse_toggle_key) {
- mouse_hook_enabled ^= 1;
- printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
- mouse_dx = mouse_dy = mouse_buttons = 0;
- }
- if (c == 'r') {
- cpu_emulation_running ^= 1;
- printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
- }
- if (c == 'R') {
- cpu_pulse_reset();
- m68k_pulse_reset();
- printf("CPU emulation reset.\n");
- }
- if (c == 'q') {
- printf("Quitting and exiting emulator.\n");
- goto stop_cpu_emulation;
+ if (!kb_hook_enabled) {
+ if (c == cfg->mouse_toggle_key) {
+ mouse_hook_enabled ^= 1;
+ printf("Mouse hook %s.\n", mouse_hook_enabled ? "enabled" : "disabled");
+ mouse_dx = mouse_dy = mouse_buttons = 0;
+ }
+ if (c == 'r') {
+ cpu_emulation_running ^= 1;
+ printf("CPU emulation is now %s\n", cpu_emulation_running ? "running" : "stopped");
+ }
+ if (c == 'R') {
+ cpu_pulse_reset();
+ m68k_pulse_reset();
+ printf("CPU emulation reset.\n");
+ }
+ if (c == 'q') {
+ printf("Quitting and exiting emulator.\n");
+ goto stop_cpu_emulation;
+ }
}
}*/
-/*
- if (toggle == 1){
- srdata = read_reg();
- m68k_set_irq((srdata >> 13) & 0xff);
- } else {
- m68k_set_irq(0);
- };
- usleep(1);
-*/
-
-
- if (GET_GPIO(1) == 0) {
- srdata = read_reg();
- m68k_set_irq((srdata >> 13) & 0xff);
- } else {
- if (CheckIrq() == 1) {
- write16(0xdff09c, 0x8008);
- m68k_set_irq(2);
- }
- else
- m68k_set_irq(0);
- };
+ //gpio_handle_irq();
+ GPIO_HANDLE_IRQ;
}
stop_cpu_emulation:;
static unsigned int target = 0;
-unsigned int m68k_read_memory_8(unsigned int address) {
- if (cfg) {
- int ret = handle_mapped_read(cfg, address, &target, OP_TYPE_BYTE, ovl);
- if (ret != -1)
- return target;
+#define PLATFORM_CHECK_READ(a) \
+ if (address >= cfg->custom_low && address < cfg->custom_high) { \
+ unsigned int target = 0; \
+ switch(cfg->platform->id) { \
+ case PLATFORM_AMIGA: { \
+ if (custom_read_amiga(cfg, address, &target, a) != -1) { \
+ return target; \
+ } \
+ break; \
+ } \
+ default: \
+ break; \
+ } \
+ } \
+ if (ovl || (address >= cfg->mapped_low && address < cfg->mapped_high)) { \
+ if (handle_mapped_read(cfg, address, &target, a) != -1) \
+ return target; \
}
+unsigned int m68k_read_memory_8(unsigned int address) {
+ PLATFORM_CHECK_READ(OP_TYPE_BYTE);
+
address &=0xFFFFFF;
-// if (address < 0xffffff) {
return read8((uint32_t)address);
-// }
-
-// return 1;
}
unsigned int m68k_read_memory_16(unsigned int address) {
- if (cfg) {
- int ret = handle_mapped_read(cfg, address, &target, OP_TYPE_WORD, ovl);
- if (ret != -1)
- return target;
- }
+ PLATFORM_CHECK_READ(OP_TYPE_WORD);
if (mouse_hook_enabled) {
if (address == JOY0DAT) {
}
}
-// if (address < 0xffffff) {
- address &=0xFFFFFF;
- return (unsigned int)read16((uint32_t)address);
-// }
-// return 1;
+ address &=0xFFFFFF;
+ return (unsigned int)read16((uint32_t)address);
}
unsigned int m68k_read_memory_32(unsigned int address) {
- if (cfg) {
- int ret = handle_mapped_read(cfg, address, &target, OP_TYPE_LONGWORD, ovl);
- if (ret != -1)
- return target;
- }
-
-// if (address < 0xffffff) {
- address &=0xFFFFFF;
- uint16_t a = read16(address);
- uint16_t b = read16(address + 2);
- return (a << 16) | b;
-// }
+ PLATFORM_CHECK_READ(OP_TYPE_LONGWORD);
-// return 1;
+ address &=0xFFFFFF;
+ uint16_t a = read16(address);
+ uint16_t b = read16(address + 2);
+ return (a << 16) | b;
}
-void m68k_write_memory_8(unsigned int address, unsigned int value) {
- if (cfg) {
- int ret = handle_mapped_write(cfg, address, value, OP_TYPE_BYTE, ovl);
- if (ret != -1)
- return;
+#define PLATFORM_CHECK_WRITE(a) \
+ if (address >= cfg->custom_low && address < cfg->custom_high) { \
+ switch(cfg->platform->id) { \
+ case PLATFORM_AMIGA: { \
+ if (custom_write_amiga(cfg, address, value, a) != -1) { \
+ return; \
+ } \
+ break; \
+ } \
+ default: \
+ break; \
+ } \
+ } \
+ if (address >= cfg->mapped_low && address < cfg->mapped_high) { \
+ if (handle_mapped_write(cfg, address, value, a) != -1) \
+ return; \
}
+void m68k_write_memory_8(unsigned int address, unsigned int value) {
+ PLATFORM_CHECK_WRITE(OP_TYPE_BYTE);
+
if (address == 0xbfe001) {
- ovl = (value & (1 << 0));
- printf("OVL:%x\n", ovl);
+ if (ovl != (value & (1 << 0))) {
+ ovl = (value & (1 << 0));
+ printf("OVL:%x\n", ovl);
+ }
}
-// if (address < 0xffffff) {
- address &=0xFFFFFF;
- write8((uint32_t)address, value);
- return;
-// }
-
-// return;
+ address &=0xFFFFFF;
+ write8((uint32_t)address, value);
+ return;
}
void m68k_write_memory_16(unsigned int address, unsigned int value) {
- if (cfg) {
- int ret = handle_mapped_write(cfg, address, value, OP_TYPE_WORD, ovl);
- if (ret != -1)
- return;
- }
+ PLATFORM_CHECK_WRITE(OP_TYPE_WORD);
-// if (address < 0xffffff) {
- address &=0xFFFFFF;
- write16((uint32_t)address, value);
- return;
-// }
-// return;
+ address &=0xFFFFFF;
+ write16((uint32_t)address, value);
+ return;
}
void m68k_write_memory_32(unsigned int address, unsigned int value) {
- if (cfg) {
- int ret = handle_mapped_write(cfg, address, value, OP_TYPE_LONGWORD, ovl);
- if (ret != -1)
- return;
- }
-
-// if (address < 0xffffff) {
- address &=0xFFFFFF;
- write16(address, value >> 16);
- write16(address + 2, value);
- return;
-// }
-
-// return;
-}
-
-void write16(uint32_t address, uint32_t data) {
- uint32_t addr_h_s = (address & 0x0000ffff) << 8;
- uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
- uint32_t addr_l_s = (address >> 16) << 8;
- uint32_t addr_l_r = (~address >> 16) << 8;
- uint32_t data_s = (data & 0x0000ffff) << 8;
- uint32_t data_r = (~data & 0x0000ffff) << 8;
-
- // asm volatile ("dmb" ::: "memory");
- W16
- *(gpio) = gpfsel0_o;
- *(gpio + 1) = gpfsel1_o;
- *(gpio + 2) = gpfsel2_o;
-
- *(gpio + 7) = addr_h_s;
- *(gpio + 10) = addr_h_r;
- GPIO_CLR = 1 << 7;
- GPIO_SET = 1 << 7;
-
- *(gpio + 7) = addr_l_s;
- *(gpio + 10) = addr_l_r;
- GPIO_CLR = 1 << 7;
- GPIO_SET = 1 << 7;
-
- // write phase
- *(gpio + 7) = data_s;
- *(gpio + 10) = data_r;
- GPIO_CLR = 1 << 7;
- GPIO_SET = 1 << 7;
-
- *(gpio) = gpfsel0;
- *(gpio + 1) = gpfsel1;
- *(gpio + 2) = gpfsel2;
- while ((GET_GPIO(0)))
- ;
- // asm volatile ("dmb" ::: "memory");
-}
-
-void write8(uint32_t address, uint32_t data) {
- if ((address & 1) == 0)
- data = data + (data << 8); // EVEN, A0=0,UDS
- else
- data = data & 0xff; // ODD , A0=1,LDS
- uint32_t addr_h_s = (address & 0x0000ffff) << 8;
- uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
- uint32_t addr_l_s = (address >> 16) << 8;
- uint32_t addr_l_r = (~address >> 16) << 8;
- uint32_t data_s = (data & 0x0000ffff) << 8;
- uint32_t data_r = (~data & 0x0000ffff) << 8;
-
- // asm volatile ("dmb" ::: "memory");
- W8
- *(gpio) = gpfsel0_o;
- *(gpio + 1) = gpfsel1_o;
- *(gpio + 2) = gpfsel2_o;
-
- *(gpio + 7) = addr_h_s;
- *(gpio + 10) = addr_h_r;
- GPIO_CLR = 1 << 7;
- GPIO_SET = 1 << 7;
-
- *(gpio + 7) = addr_l_s;
- *(gpio + 10) = addr_l_r;
- GPIO_CLR = 1 << 7;
- GPIO_SET = 1 << 7;
-
- // write phase
- *(gpio + 7) = data_s;
- *(gpio + 10) = data_r;
- GPIO_CLR = 1 << 7;
- GPIO_SET = 1 << 7;
-
- *(gpio) = gpfsel0;
- *(gpio + 1) = gpfsel1;
- *(gpio + 2) = gpfsel2;
- while ((GET_GPIO(0)))
- ;
- // asm volatile ("dmb" ::: "memory");
-}
-
-uint32_t read16(uint32_t address) {
- volatile int val;
- uint32_t addr_h_s = (address & 0x0000ffff) << 8;
- uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
- uint32_t addr_l_s = (address >> 16) << 8;
- uint32_t addr_l_r = (~address >> 16) << 8;
-
- // asm volatile ("dmb" ::: "memory");
- R16
- *(gpio) = gpfsel0_o;
- *(gpio + 1) = gpfsel1_o;
- *(gpio + 2) = gpfsel2_o;
-
- *(gpio + 7) = addr_h_s;
- *(gpio + 10) = addr_h_r;
- GPIO_CLR = 1 << 7;
- GPIO_SET = 1 << 7;
-
- *(gpio + 7) = addr_l_s;
- *(gpio + 10) = addr_l_r;
- GPIO_CLR = 1 << 7;
- GPIO_SET = 1 << 7;
-
- // read phase
- *(gpio) = gpfsel0;
- *(gpio + 1) = gpfsel1;
- *(gpio + 2) = gpfsel2;
- GPIO_CLR = 1 << 6;
- while (!(GET_GPIO(0)))
- ;
- GPIO_CLR = 1 << 6;
- val = *(gpio + 13);
- GPIO_SET = 1 << 6;
- // asm volatile ("dmb" ::: "memory");
- return (val >> 8) & 0xffff;
-}
+ PLATFORM_CHECK_WRITE(OP_TYPE_LONGWORD);
-uint32_t read8(uint32_t address) {
- int val;
- uint32_t addr_h_s = (address & 0x0000ffff) << 8;
- uint32_t addr_h_r = (~address & 0x0000ffff) << 8;
- uint32_t addr_l_s = (address >> 16) << 8;
- uint32_t addr_l_r = (~address >> 16) << 8;
-
- // asm volatile ("dmb" ::: "memory");
- R8
- *(gpio) = gpfsel0_o;
- *(gpio + 1) = gpfsel1_o;
- *(gpio + 2) = gpfsel2_o;
-
- *(gpio + 7) = addr_h_s;
- *(gpio + 10) = addr_h_r;
- GPIO_CLR = 1 << 7;
- GPIO_SET = 1 << 7;
-
- *(gpio + 7) = addr_l_s;
- *(gpio + 10) = addr_l_r;
- GPIO_CLR = 1 << 7;
- GPIO_SET = 1 << 7;
-
- // read phase
- *(gpio) = gpfsel0;
- *(gpio + 1) = gpfsel1;
- *(gpio + 2) = gpfsel2;
-
- GPIO_CLR = 1 << 6;
- while (!(GET_GPIO(0)))
- ;
- GPIO_CLR = 1 << 6;
- val = *(gpio + 13);
- GPIO_SET = 1 << 6;
- // asm volatile ("dmb" ::: "memory");
-
- val = (val >> 8) & 0xffff;
- if ((address & 1) == 0)
- return (val >> 8) & 0xff; // EVEN, A0=0,UDS
- else
- return val & 0xff; // ODD , A0=1,LDS
+ address &=0xFFFFFF;
+ write16(address, value >> 16);
+ write16(address + 2, value);
+ return;
}
-
-/******************************************************/
-
-void write_reg(unsigned int value) {
- STATUSREGADDR
- *(gpio) = gpfsel0_o;
- *(gpio + 1) = gpfsel1_o;
- *(gpio + 2) = gpfsel2_o;
- *(gpio + 7) = (value & 0xffff) << 8;
- *(gpio + 10) = (~value & 0xffff) << 8;
- GPIO_CLR = 1 << 7;
- GPIO_CLR = 1 << 7; // delay
- GPIO_SET = 1 << 7;
- GPIO_SET = 1 << 7;
- // Bus HIGH-Z
- *(gpio) = gpfsel0;
- *(gpio + 1) = gpfsel1;
- *(gpio + 2) = gpfsel2;
-}
-
-uint16_t read_reg(void) {
- uint32_t val;
- STATUSREGADDR
- // Bus HIGH-Z
- *(gpio) = gpfsel0;
- *(gpio + 1) = gpfsel1;
- *(gpio + 2) = gpfsel2;
- GPIO_CLR = 1 << 6;
- GPIO_CLR = 1 << 6; // delay
- GPIO_CLR = 1 << 6;
- GPIO_CLR = 1 << 6;
- val = *(gpio + 13);
- GPIO_SET = 1 << 6;
- return (uint16_t)(val >> 8);
-}
-
-//
-// Set up a memory regions to access GPIO
-//
-void setup_io() {
- /* open /dev/mem */
- if ((mem_fd = open("/dev/mem", O_RDWR | O_SYNC)) < 0) {
- printf("can't open /dev/mem \n");
- exit(-1);
- }
-
- /* mmap GPIO */
- gpio_map = mmap(
- NULL, // Any adddress in our space will do
- BCM2708_PERI_SIZE, // Map length
- PROT_READ | PROT_WRITE, // Enable reading & writting to mapped memory
- MAP_SHARED, // Shared with other processes
- mem_fd, // File to map
- BCM2708_PERI_BASE // Offset to GPIO peripheral
- );
-
- close(mem_fd); // No need to keep mem_fd open after mmap
-
- if (gpio_map == MAP_FAILED) {
- printf("gpio mmap error %d\n", (int)gpio_map); // errno also set!
- exit(-1);
- }
-
- gpio = ((volatile unsigned *)gpio_map) + GPIO_ADDR / 4;
- gpclk = ((volatile unsigned *)gpio_map) + GPCLK_ADDR / 4;
-
-} // setup_io
projects / pistorm / blobdiff