+++ /dev/null
-/*
- * Copyright © 2008 Keith Packard <keithp@keithp.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- */
-
-#include <stdint.h>
-
-/*
- * Validate the SPI-connected EEPROM
- */
-
-sfr at 0x80 P0;
-sfr at 0x90 P1;
-sfr at 0xA0 P2;
-sfr at 0xC6 CLKCON;
-sfr at 0xbe SLEEP;
-
-# define SLEEP_USB_EN (1 << 7)
-# define SLEEP_XOSC_STB (1 << 6)
-
-sfr at 0xF1 PERCFG;
-#define PERCFG_T1CFG_ALT_1 (0 << 6)
-#define PERCFG_T1CFG_ALT_2 (1 << 6)
-
-#define PERCFG_T3CFG_ALT_1 (0 << 5)
-#define PERCFG_T3CFG_ALT_2 (1 << 5)
-
-#define PERCFG_T4CFG_ALT_1 (0 << 4)
-#define PERCFG_T4CFG_ALT_2 (1 << 4)
-
-#define PERCFG_U1CFG_ALT_1 (0 << 1)
-#define PERCFG_U1CFG_ALT_2 (1 << 1)
-
-#define PERCFG_U0CFG_ALT_1 (0 << 0)
-#define PERCFG_U0CFG_ALT_2 (1 << 0)
-
-sfr at 0xF2 ADCCFG;
-sfr at 0xF3 P0SEL;
-sfr at 0xF4 P1SEL;
-sfr at 0xF5 P2SEL;
-
-sfr at 0xFD P0DIR;
-sfr at 0xFE P1DIR;
-sfr at 0xFF P2DIR;
-sfr at 0x8F P0INP;
-sfr at 0xF6 P1INP;
-sfr at 0xF7 P2INP;
-
-sfr at 0x89 P0IFG;
-sfr at 0x8A P1IFG;
-sfr at 0x8B P2IFG;
-
-sbit at 0x90 P1_0;
-sbit at 0x91 P1_1;
-sbit at 0x92 P1_2;
-sbit at 0x93 P1_3;
-sbit at 0x94 P1_4;
-sbit at 0x95 P1_5;
-sbit at 0x96 P1_6;
-sbit at 0x97 P1_7;
-
-/*
- * UART registers
- */
-
-sfr at 0x86 U0CSR;
-sfr at 0xF8 U1CSR;
-
-# define UxCSR_MODE_UART (1 << 7)
-# define UxCSR_MODE_SPI (0 << 7)
-# define UxCSR_RE (1 << 6)
-# define UxCSR_SLAVE (1 << 5)
-# define UxCSR_MASTER (0 << 5)
-# define UxCSR_FE (1 << 4)
-# define UxCSR_ERR (1 << 3)
-# define UxCSR_RX_BYTE (1 << 2)
-# define UxCSR_TX_BYTE (1 << 1)
-# define UxCSR_ACTIVE (1 << 0)
-
-sfr at 0xc4 U0UCR;
-sfr at 0xfb U1UCR;
-
-sfr at 0xc5 U0GCR;
-sfr at 0xfc U1GCR;
-
-# define UxGCR_CPOL_NEGATIVE (0 << 7)
-# define UxGCR_CPOL_POSITIVE (1 << 7)
-# define UxGCR_CPHA_FIRST_EDGE (0 << 6)
-# define UxGCR_CPHA_SECOND_EDGE (1 << 6)
-# define UxGCR_ORDER_LSB (0 << 5)
-# define UxGCR_ORDER_MSB (1 << 5)
-# define UxGCR_BAUD_E_MASK (0x1f)
-# define UxGCR_BAUD_E_SHIFT 0
-
-sfr at 0xc1 U0DBUF;
-sfr at 0xf9 U1DBUF;
-sfr at 0xc2 U0BAUD;
-sfr at 0xfa U1BAUD;
-
-#define MOSI P1_5
-#define MISO P1_4
-#define SCK P1_3
-#define CS P1_2
-
-#define DEBUG P1_1
-
-#define BITBANG 0
-#define USART 1
-
-#define nop() _asm nop _endasm;
-
-void
-delay (unsigned char n)
-{
- unsigned char i = 0;
- unsigned char j = 0;
-
- while (--n != 0)
- while (--i != 0)
- while (--j != 0)
- nop();
-}
-
-#if BITBANG
-
-/*
- * This version directly manipulates the GPIOs to synthesize SPI
- */
-
-void
-bitbang_cs(uint8_t b)
-{
- SCK = 0;
- CS = b;
- delay(1);
-}
-
-void
-bitbang_out_bit(uint8_t b)
-{
- MOSI = b;
- delay(1);
- SCK = 1;
- delay(1);
- SCK = 0;
-}
-
-void
-bitbang_out_byte(uint8_t byte)
-{
- uint8_t s;
-
- for (s = 0; s < 8; s++) {
- uint8_t b = (byte & 0x80) ? 1 : 0;
- bitbang_out_bit(b);
- byte <<= 1;
- }
-}
-
-uint8_t
-bitbang_in_bit(void)
-{
- uint8_t b;
-
- delay(1);
- SCK = 1;
- delay(1);
- b = MISO;
- SCK = 0;
- return b;
-}
-
-uint8_t
-bitbang_in_byte(void)
-{
- uint8_t byte = 0;
- uint8_t s;
- uint8_t b;
-
- for (s = 0; s < 8; s++) {
- b = bitbang_in_bit();
- byte = byte << 1;
- byte |= b;
- }
- return byte;
-}
-
-void
-bit_bang_init(void)
-{
- CS = 1;
- SCK = 0;
- P1DIR = ((1 << 5) |
- (0 << 4) |
- (1 << 3) |
- (1 << 2) |
- (1 << 1));
-}
-
-#define spi_init() bitbang_init()
-#define spi_out_byte(b) bitbang_out_byte(b)
-#define spi_in_byte() bitbang_in_byte()
-#define spi_cs(b) bitbang_cs(b)
-#endif
-
-#if USART
-
-/*
- * This version uses the USART in SPI mode
- */
-void
-usart_init(void)
-{
- /*
- * Configure our chip select line
- */
- CS = 1;
- P1DIR |= (1 << 2);
- /*
- * Configure the peripheral pin choices
- * for both of the serial ports
- *
- * Note that telemetrum will use U1CFG_ALT_2
- * but that overlaps with SPI ALT_2, so until
- * we can test that this works, we'll set this
- * to ALT_1
- */
- PERCFG = (PERCFG_U1CFG_ALT_1 |
- PERCFG_U0CFG_ALT_2);
-
- /*
- * Make the SPI pins controlled by the SPI
- * hardware
- */
- P1SEL |= ((1 << 5) | (1 << 4) | (1 << 3));
-
- /*
- * SPI in master mode
- */
- U0CSR = (UxCSR_MODE_SPI |
- UxCSR_MASTER);
-
- /*
- * The cc1111 is limited to a 24/8 MHz SPI clock,
- * while the 25LC1024 is limited to 20MHz. So,
- * use the 3MHz clock (BAUD_E 17, BAUD_M 0)
- */
- U0BAUD = 0;
- U0GCR = (UxGCR_CPOL_NEGATIVE |
- UxGCR_CPHA_FIRST_EDGE |
- UxGCR_ORDER_MSB |
- (17 << UxGCR_BAUD_E_SHIFT));
-}
-
-void
-usart_cs(uint8_t b)
-{
- CS = b;
-}
-
-uint8_t
-usart_in_out(uint8_t byte)
-{
- U0DBUF = byte;
- while ((U0CSR & UxCSR_TX_BYTE) == 0)
- ;
- U0CSR &= ~UxCSR_TX_BYTE;
- return U0DBUF;
-}
-
-void
-usart_out_byte(uint8_t byte)
-{
- (void) usart_in_out(byte);
-}
-
-uint8_t
-usart_in_byte(void)
-{
- return usart_in_out(0xff);
-}
-
-#define spi_init() usart_init()
-#define spi_out_byte(b) usart_out_byte(b)
-#define spi_in_byte() usart_in_byte()
-#define spi_cs(b) usart_cs(b)
-
-#endif
-
-uint8_t
-rdsr(void)
-{
- uint8_t status;
- spi_cs(0);
- spi_out_byte(0x05);
- status = spi_in_byte();
- spi_cs(1);
- return status;
-}
-
-void
-wrsr(uint8_t status)
-{
- spi_cs(0);
- spi_out_byte(0x01);
- spi_out_byte(status);
- spi_cs(1);
-}
-
-void
-wren(void)
-{
- spi_cs(0);
- spi_out_byte(0x06);
- spi_cs(1);
-}
-
-void
-write(uint32_t addr, uint8_t *bytes, uint16_t len)
-{
- wren();
- spi_cs(0);
- spi_out_byte(0x02);
- spi_out_byte(addr >> 16);
- spi_out_byte(addr >> 8);
- spi_out_byte(addr);
- while (len-- > 0)
- spi_out_byte(*bytes++);
- spi_cs(1);
- for (;;) {
- uint8_t status = rdsr();
- if ((status & (1 << 0)) == 0)
- break;
- }
-}
-
-void
-read(uint32_t addr, uint8_t *bytes, uint16_t len)
-{
- spi_cs(0);
- spi_out_byte(0x03);
- spi_out_byte(addr >> 16);
- spi_out_byte(addr >> 8);
- spi_out_byte(addr);
- while (len-- > 0)
- *bytes++ = spi_in_byte();
- spi_cs(1);
-}
-
-void
-debug_byte(uint8_t byte)
-{
- uint8_t s;
-
- for (s = 0; s < 8; s++) {
- DEBUG = byte & 1;
- delay(5);
- byte >>= 1;
- }
-}
-
-#define STRING "\360\252"
-#define LENGTH 2
-
-main ()
-{
- uint8_t status;
- uint8_t buf[LENGTH];
- int i;
-
- P1DIR |= 2;
- CLKCON = 0;
- while (!(SLEEP & SLEEP_XOSC_STB))
- ;
-
- spi_init();
-
- status = rdsr();
- /*
- * Turn off both block-protect bits
- */
- status &= ~((1 << 3) | (1 << 2));
- /*
- * Turn off write protect enable
- */
- status &= ~(1 << 7);
- wrsr(status);
- write(0x0, STRING, LENGTH);
- for (;;) {
- read(0x0, buf, LENGTH);
- for (i = 0; i < LENGTH; i++)
- debug_byte(buf[i]);
- }
-}
projects / fw / altos / blobdiff