X-Git-Url: http://cloudbase.mooo.com/gitweb/z180-stamp.git/blobdiff_plain/323398b1e863d2a23251d44d3bba260675139499..76c082ca2a2c560e660daca0a8294b73881423d8:/avr/main.c diff --git a/avr/main.c b/avr/main.c index 79ca3e0..6fd29a8 100644 --- a/avr/main.c +++ b/avr/main.c @@ -1,50 +1,117 @@ /* + * (C) Copyright 2014 Leo C. + * + * SPDX-License-Identifier: GPL-2.0 */ #include "common.h" - -#include -//#include -//#include #include -//#include -//#include -//#include - -#include - +#include #include -#include - #include "config.h" -#include "debug.h" +#include "ff.h" #include "z80-if.h" +#include "i2c.h" #include "con-utils.h" #include "serial.h" #include "timer.h" #include "cli.h" #include "env.h" +#include "z180-serv.h" +#include "gpio.h" +#include "time.h" +#include "rtc.h" +#include "debug.h" +#include "cmd_fat.h" + + +uint8_t mcusr __attribute__ ((section (".noinit"))); + +#if DEBUG +__attribute__ ((naked)) __attribute__ ((section (".init3"))) +void preset_ram (void) +{ + for (uint8_t *p = (uint8_t *) RAMSTART; p <= (uint8_t *) RAMEND; p++) + *p = 0xdd; + +} +#endif + +__attribute__ ((naked)) __attribute__ ((section (".init3"))) +void get_mcusr (void) +{ + /* save and clear reset reason(s) */ + /* TODO: move to init section? */ + mcusr = MCUSR; + MCUSR = 0; + + wdt_disable(); +} /*--------------------------------------------------------------------------*/ +#if DEBUG + +static const FLASH char * const FLASH rreasons[] = { + FSTR("Power on"), + FSTR("External"), + FSTR("Brown out"), + FSTR("Watchdog"), + FSTR("JTAG"), + }; + +static +void print_reset_reason(void) +{ + uint8_t r = mcusr & 0x1f; + const FLASH char * const FLASH *p = rreasons; + + my_puts_P(PSTR("### Reset reason(s): ")); + if (r == 0) + my_puts_P(PSTR("none")); + for ( ; r; p++, r >>= 1) { + if (r & 1) { + my_puts_P(*p); + if (r & ~1) + my_puts_P(PSTR(", ")); + } + } + my_puts_P(PSTR(".\n")); +} -void setup_avr(void) +#endif + +ISR(INT5_vect) +{ + Stat |= S_MSG_PENDING; + Stat |= S_IO_0X40; +} + +ISR(INT6_vect) { - /* WD */ + Stat |= S_CON_PENDING; +} +static +void setup_avr(void) +{ /* CPU */ /* Disable JTAG Interface regardless of the JTAGEN fuse setting. */ MCUCR = _BV(JTD); MCUCR = _BV(JTD); - /* disable unused periphels */ - PRR0 = _BV(PRTIM2) | _BV(PRTIM0) | _BV(PRADC); - PRR1 = _BV(PRTIM5) | _BV(PRTIM4) | _BV(PRTIM3) | + /* Disable peripherals. Enable individually in respective init function. */ + PRR0 = _BV(PRTWI) | + _BV(PRTIM2) | _BV(PRTIM0) | _BV(PRTIM1) | + _BV(PRSPI) | _BV(PRUSART0) | _BV(PRADC); + + PRR1 = _BV(PRTIM5) | _BV(PRTIM4) | _BV(PRTIM3) | _BV(PRUSART3) | _BV(PRUSART2) | _BV(PRUSART1); - /* disable analog comparator */ + + /* Disable analog comparator */ ACSR = _BV(ACD); /* Ports */ @@ -52,20 +119,36 @@ void setup_avr(void) CLKPR = _BV(CLKPCE); CLKPR = 0; - /* Timer */ + /* System timer */ + setup_timer(); - OCR1A = F_CPU / 8 / 1000 - 1; // Timer1: 1000Hz interval (OC1A) - TCCR1B = 0b00001010; - TIMSK1 = _BV(OCIE1A); // Enable TC1.oca interrupt + /* INT5, INT6: falling edge */ + EICRB = (EICRB & ~((0b11 << ISC50) | (0b11 << ISC60))) | + (0b10 << ISC50) | (0b10 << ISC60); + /* Reset pending ints */ + EIFR |= _BV(INTF5) | _BV(INTF6); + /* Enable INT5, and INT6 */ + EIMSK |= _BV(INT5) | _BV(INT6); } +static +int reset_reason_is_power_on(void) +{ + return (mcusr & _BV(PORF)) != 0; +} +static +void setup_system_time(void) +{ + struct tm rtc_time; -/*******************************************************************************/ -/*******************************************************************************/ + rtc_get(&rtc_time); + rtc_time.tm_isdst = 0; + set_system_time(mk_gmtime(&rtc_time) ); +} -#define udelay(n) _delay_us(n) +/*--------------------------------------------------------------------------*/ /* Stored value of bootdelay, used by autoboot_command() */ static int stored_bootdelay; @@ -73,7 +156,7 @@ static int stored_bootdelay; /*************************************************************************** * Watch for 'delay' seconds for autoboot stop. - * returns: 0 - no key, allow autoboot + * returns: 0 - no key, allow autoboot * 1 - got key, abort */ @@ -92,7 +175,7 @@ static int abortboot(int bootdelay) */ if (bootdelay >= 0) { if (tstc()) { /* we got a key press */ - (void) my_getchar(); /* consume input */ + (void) my_getchar(1); /* consume input */ my_puts_P(PSTR("\b\b\b 0")); abort = 1; /* don't auto boot */ } @@ -120,26 +203,27 @@ static int abortboot(int bootdelay) return abort; } +static const char *bootdelay_process(void) { char *s; int bootdelay; - s = getenv("bootdelay"); - bootdelay = s ? atoi(s) : CONFIG_BOOTDELAY; + bootdelay = (int) getenv_ulong(PSTR(ENV_BOOTDELAY), 10, CONFIG_BOOTDELAY); debug("### main_loop entered: bootdelay=%d\n\n", bootdelay); _delay_ms(20); - s = getenv("bootcmd"); + s = getenv_str(PSTR(ENV_BOOTCMD)); stored_bootdelay = bootdelay; return s; } +static void autoboot_command(const char *s) { - debug("### main_loop: bootcmd=\"%s\"\n", s ? s : PSTR("")); + debug("### main_loop: bootcmd=\"%s\"\n", s ? s : ""); _delay_ms(20); if (stored_bootdelay != -1 && s && !abortboot(stored_bootdelay)) { @@ -148,6 +232,7 @@ void autoboot_command(const char *s) } +static void main_loop(void) { const char *s; @@ -159,17 +244,34 @@ void main_loop(void) int main(void) { + extern void setup_mmc(void); + + __malloc_margin = CONFIG_SYS_MALLOC_MARGIN; setup_avr(); + for (int i = 0; i < GPIO_MAX; i++) + gpio_config(i, INPUT_PULLUP); + setup_mmc(); + env_init(); z80_setup_bus(); - - serial_setup(); + + if (reset_reason_is_power_on()) + _delay_ms(CONFIG_PWRON_DELAY); + + serial_setup(getenv_ulong(PSTR(ENV_BAUDRATE), 10, CONFIG_BAUDRATE)); sei(); +#if DEBUG debug("\n=========================< (RE)START DEBUG >=========================\n"); - - env_init(); + print_reset_reason(); +#endif + + i2c_init(CONFIG_SYS_I2C_CLOCK); + setup_system_time(); + setup_fatfs(); + + printf_P(PSTR("\n" stringify(DEVICE_NAME) "+Z8S180 Stamp Monitor - Version: " VERSION " \n\n")); + + setup_z180_serv(); - printf_P(PSTR("\n(ATMEGA1281+HD64180)_stamp Tester\n")); - main_loop(); }