From 0c5890bb8c70f34026315c9c5a1878cfd0bbea0d Mon Sep 17 00:00:00 2001 From: Leo C Date: Wed, 2 Jul 2014 15:24:17 +0200 Subject: New sub dir: avr. --- avr/z180-stamp-avr.c | 440 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 440 insertions(+) create mode 100644 avr/z180-stamp-avr.c (limited to 'avr/z180-stamp-avr.c') diff --git a/avr/z180-stamp-avr.c b/avr/z180-stamp-avr.c new file mode 100644 index 0000000..4ea4d47 --- /dev/null +++ b/avr/z180-stamp-avr.c @@ -0,0 +1,440 @@ +/* + */ + + +#include +//#include +//#include +//#include +//#include +//#include +//#include + +#include + + +#include "debug.h" +#include "serial.h" +#include "z80-if.h" + +#define const const __flash +#include "../z180/hdrom.h" +#undef const + +#define FLASH __flash +//#define FLASH + +#define ESCCHAR ('^'-0x40) + +#define S_10MS_TO (1<<0) + + +volatile int_fast8_t timeout_1s; +volatile uint_least8_t Stat; + + +/****************************************************************/ + +#define P_ADL PORTA +#define P_ADH PORTC +#define P_ADB PORTE +#define PIN_ADB PINE + +#define ADB_WIDTH 3 +#define ADB_SHIFT 2 +//#define ADB_PORT GPIOE + +#define MASK(n) ((1<<(n))-1) +#define SMASK(w,s) (MASK(w) << (s)) + +typedef union { + uint32_t l; + uint16_t w[2]; + uint8_t b[4]; +} addr_t; + + + +void z80_setaddress(uint32_t addr) +{ + addr_t x; + + x.l = addr; + P_ADL = x.b[0]; + P_ADH = x.b[1]; + PIN_ADB = ((x.b[2] << ADB_SHIFT) ^ P_ADB) & MASK(ADB_WIDTH) << ADB_SHIFT ; + +} + +/****************************************************************/ + +/*--------------------------------------------------------------------------*/ + + +void sys_tick_handler(void) +{ + static int_fast8_t tick_10ms = 0; + static int_fast16_t count_ms = 0; + + int_fast8_t i; + + ++tick_10ms; + if (tick_10ms == 10) + { + Stat |= S_10MS_TO; + + tick_10ms = 0; + + + /* Drive timer procedure of low level disk I/O module */ + //disk_timerproc(); + } + + count_ms++; + if (count_ms == 1000) { + count_ms = 0; + + i = timeout_1s; + if (i) + timeout_1s = i - 1; + } +} + + +/*--------------------------------------------------------------------------*/ + +static uint32_t z80_sram_cmp(uint32_t addr, uint32_t length, uint8_t wval, int inc) +{ + uint8_t rval; + int_fast8_t errors = 0; + + DBG_P(1, "SRAM: Check %#.5x byte... ", length); + while (length--) { + if ((rval = z80_read(addr)) != wval) { + if (errors == 0) { + printf("\nSRAM: Address W R\n" \ + " -------------\n"); +// 12345 00 11 + } + printf(" %.5lx %.2x %.2x\n", addr, wval, rval); + + if (++errors > 16 ) + break; + } + addr++; + wval += inc; + } + DBG_P(1, "Done.\n"); + + return addr; +} + +#if 0 +static void z80_sram_fill(uint32_t addr, int length, uint8_t startval, int inc) +{ + printf("SRAM: Write %#.5x byte... ", length); //fflush(stdout); + while (length--) { + z80_write(addr, startval); + ++addr; + startval += inc; + } + printf("Done.\n"); +} + + +void z80_sram_fill_string(uint32_t addr, int length, const char *text) +{ + char c; + const char *p = text; + + while (length--) { + z80_write(addr++, c = *p++); + if (c == 0) + p = text; + } +} + + +uint32_t z80_sram_cmp_string(uint32_t addr, int length, const char *text) +{ + char c; + const char *p = text; + + while (length--) { + c = *p++; + if (z80_read(addr) != c) + break; + ++addr; + if (c == 0) + p = text; + } + return addr; +} + +const char * const qbfox = "Zhe quick brown fox jumps over the lazy dog!"; +const char * const qbcat = "Zhe quick brown fox jumps over the lazy cat!"; + +#endif + +uint8_t z80_get_byte(uint32_t adr) +{ + uint8_t data; + + z80_request_bus(); + data = z80_read(adr), + z80_release_bus(); + + return data; +} + + +/*--------------------------------------------------------------------------*/ + +static void do_10ms(void) +{ +} + +/*--------------------------------------------------------------------------*/ + +struct msg_item { + uint8_t fct; + uint8_t sub_min, sub_max; + void (*func)(uint8_t, int, uint8_t *); +}; + +uint32_t msg_to_addr(uint8_t *msg) +{ + union { + uint32_t as32; + uint8_t as8[4]; + } addr; + + addr.as8[0] = msg[0]; + addr.as8[1] = msg[1]; + addr.as8[2] = msg[2]; + addr.as8[3] = 0; + + return addr.as32; +} + +void do_msg_ini_msgfifo(uint8_t subf, int len, uint8_t * msg) +{ + (void)subf; (void)len; + + z80_init_msg_fifo(msg_to_addr(msg)); +} + + +void do_msg_ini_memfifo(uint8_t subf, int len, uint8_t * msg) +{ + (void)len; + + z80_memfifo_init(subf - 1, msg_to_addr(msg)); +} + + +void do_msg_char_out(uint8_t subf, int len, uint8_t * msg) +{ + (void)subf; + + while (len--) + putchar(*msg++); +} + + +const FLASH struct msg_item z80_messages[] = +{ + { 0, /* fct nr. */ + 0, 0, /* sub fct nr. from, to */ + &do_msg_ini_msgfifo}, + { 0, + 1, 2, + &do_msg_ini_memfifo}, + { 1, + 1, 1, + &do_msg_char_out}, + { 0xff, /* end mark */ + 0, 0, + 0}, + +}; + + + + +void do_message(int len, uint8_t *msg) +{ + uint8_t fct, sub_fct; + int_fast8_t i = 0; + + if (len >= 2) { + fct = *msg++; + sub_fct = *msg++; + len -= 2; + + while (fct != z80_messages[i].fct) + ++i; + + if (z80_messages[i].fct == 0xff) { + DBG_P(1, "do_message: Unknown function: %i, %i\n", + fct, sub_fct); + return; /* TODO: unknown message # */ + } + + while (fct == z80_messages[i].fct) { + if (sub_fct >= z80_messages[i].sub_min && sub_fct <= z80_messages[i].sub_max ) + break; + ++i; + } + + if (z80_messages[i].fct != fct) { + DBG_P(1, "do_message: Unknown sub function: %i, %i\n", + fct, sub_fct); + return; /* TODO: unknown message sub# */ + } + + (z80_messages[i].func)(sub_fct, len, msg); + + + } else { + /* TODO: error */ + DBG_P(1, "do_message: to few arguments (%i); this shouldn't happen!\n", len); + } +} + + + +#define CTRBUF_LEN 256 + +void check_msg_fifo(void) +{ + int ch; + static int_fast8_t state; + static int msglen,idx; + static uint8_t buffer[CTRBUF_LEN]; + + while (state != 3 && (ch = z80_msg_fifo_getc()) >= 0) { + switch (state) { + case 0: /* wait for start of message */ + if (ch == 0x81) { + msglen = 0; + idx = 0; + state = 1; + } + break; + case 1: /* get msg len */ + if (ch > 0 && ch <= CTRBUF_LEN) { + msglen = ch; + state = 2; + } else + state = 0; + break; + case 2: /* get message */ + buffer[idx++] = ch; + if (idx == msglen) + state = 3; + break; + } + } + + if (state == 3) { + do_message(msglen, buffer); + state = 0; + } +} + + +void z80_load_mem(void) +{ + unsigned sec = 0; + uint32_t sec_base = hdrom_start; + + DBG_P(1, "Loading z80 memory... \n"); + + while (sec < hdrom_sections) { + DBG_P(2, " From: 0x%.5lX to: 0x%.5lX (%5li bytes)\n", + hdrom_address[sec], + hdrom_address[sec]+hdrom_length_of_sections[sec] - 1, + hdrom_length_of_sections[sec]); + + z80_write_block((unsigned char *) &hdrom[sec_base], /* src */ + hdrom_address[sec], /* dest */ + hdrom_length_of_sections[sec]); /* len */ + sec_base+=hdrom_length_of_sections[sec]; + sec++; + } +} +/*--------------------------------------------------------------------------*/ + +int main(void) +{ + int_fast8_t state = 0; + int ch; + +// setvbuf(stdout, NULL, _IONBF, 0); + serial_setup(); +// printf("\n(STM32F100+HD64180)_stamp Tester\n"); + printf("\n(ATMEGA1281+HD64180)_stamp Tester\n"); + + DBG_P(1, "z80_setup_bus... "); + z80_setup_msg_fifo(); + z80_setup_bus(); + DBG_P(1, "done.\n"); + + + DBG_P(1, "Get bus... "); + z80_busreq(LOW); + z80_reset(HIGH); + z80_request_bus(); + DBG_P(1, "got it!\n"); + + z80_memset(0, 0x76, 0x80000); + //z80_sram_fill(0, 512 * 1024, 0x76, 0); + z80_sram_cmp(0, (uint32_t)512 * 1024, 0x76, 0); + + z80_load_mem(); + z80_reset(LOW); + DBG_P(1, "Bus released!\n"); + z80_release_bus(); + z80_reset(HIGH); + DBG_P(1, "Reset released!\n"); + + + while (1) { + + if (Stat & S_10MS_TO) { + Stat &= ~S_10MS_TO; + do_10ms(); + } + + + if ((ch = serial_getc()) >= 0) { + switch (state) { + case 0: + if (ch == ESCCHAR) { + state = 1; + /* TODO: Timer starten */ + } else + z80_memfifo_putc(fifo_out, ch); + break; + case 1: + switch (ch) { + + case 'r': + z80_reset_pulse(); + break; + + case ESCCHAR: + default: + z80_memfifo_putc(fifo_out, ch); + } + state = 0; + break; + } + } + + check_msg_fifo(); + } + + return 0; +} -- cgit v1.2.3