From: asterix Date: Mon, 19 May 2008 14:20:57 +0000 (+0000) Subject: This drive is avr specific, so we rename it. X-Git-Tag: 2.0.0~652 X-Git-Url: https://codewiz.org/gitweb?a=commitdiff_plain;ds=inline;h=f05e292dbd2c06a5bb0b60de8bb51404c4fb8f7a;p=bertos.git This drive is avr specific, so we rename it. git-svn-id: https://src.develer.com/svnoss/bertos/trunk@1282 38d2e660-2303-0410-9eaa-f027e97ec537 --- diff --git a/bertos/drv/eeprom.c b/bertos/drv/eeprom.c deleted file mode 100644 index 4e7f615f..00000000 --- a/bertos/drv/eeprom.c +++ /dev/null @@ -1,341 +0,0 @@ -/** - * \file - * - * - * \brief Driver for the 24xx16 and 24xx256 I2C EEPROMS (implementation) - * - * \note This implementation is AVR specific. - * - * \version $Id$ - * \author Stefano Fedrigo - * \author Bernardo Innocenti - */ - -#include "eeprom.h" - -#include -#include // CONFIG_EEPROM_VERIFY -#include // MIN() -#include -#include CPU_HEADER(twi) -#include -#include // cpu_to_be16() - -#include // memset() - - -// Configuration sanity checks -#if !defined(CONFIG_EEPROM_VERIFY) || (CONFIG_EEPROM_VERIFY != 0 && CONFIG_EEPROM_VERIFY != 1) - #error CONFIG_EEPROM_VERIFY must be defined to either 0 or 1 -#endif - -/** - * EEPROM ID code - */ -#define EEPROM_ID 0xA0 - -/** - * This macros form the correct slave address for EEPROMs - */ -#define EEPROM_ADDR(x) (EEPROM_ID | (((uint8_t)(x)) << 1)) - - - - -/** - * Copy \c count bytes from buffer \c buf to - * eeprom at address \c addr. - */ -static bool eeprom_writeRaw(e2addr_t addr, const void *buf, size_t count) -{ - bool result = true; - ASSERT(addr + count <= EEPROM_SIZE); - - while (count && result) - { - /* - * Split write in multiple sequential mode operations that - * don't cross page boundaries. - */ - size_t size = - MIN(count, (size_t)(EEPROM_BLKSIZE - (addr & (EEPROM_BLKSIZE - 1)))); - - #if CONFIG_EEPROM_TYPE == EEPROM_24XX16 - /* - * The 24LC16 uses the slave address as a 3-bit - * block address. - */ - uint8_t blk_addr = (uint8_t)((addr >> 8) & 0x07); - uint8_t blk_offs = (uint8_t)addr; - - result = - twi_start_w(EEPROM_ADDR(blk_addr)) - && twi_send(&blk_offs, sizeof blk_offs) - && twi_send(buf, size); - - #elif CONFIG_EEPROM_TYPE == EEPROM_24XX256 - - // 24LC256 wants big-endian addresses - uint16_t addr_be = cpu_to_be16(addr); - - result = - twi_start_w(EEPROM_ID) - && twi_send((uint8_t *)&addr_be, sizeof addr_be) - && twi_send(buf, size); - - #else - #error Unknown device type - #endif - - twi_stop(); - - // DEBUG - //kprintf("addr=%d, count=%d, size=%d, *#?=%d\n", - // addr, count, size, - // (EEPROM_BLKSIZE - (addr & (EEPROM_BLKSIZE - 1))) - //); - - /* Update count and addr for next operation */ - count -= size; - addr += size; - buf = ((const char *)buf) + size; - } - - if (!result) - TRACEMSG("Write error!"); - return result; -} - - -#if CONFIG_EEPROM_VERIFY -/** - * Check that the contents of an EEPROM range - * match with a provided data buffer. - * - * \return true on success. - */ -static bool eeprom_verify(e2addr_t addr, const void *buf, size_t count) -{ - uint8_t verify_buf[16]; - bool result = true; - - while (count && result) - { - /* Split read in smaller pieces */ - size_t size = MIN(count, sizeof verify_buf); - - /* Read back buffer */ - if (eeprom_read(addr, verify_buf, size)) - { - if (memcmp(buf, verify_buf, size) != 0) - { - TRACEMSG("Data mismatch!"); - result = false; - } - } - else - { - TRACEMSG("Read error!"); - result = false; - } - - /* Update count and addr for next operation */ - count -= size; - addr += size; - buf = ((const char *)buf) + size; - } - - return result; -} -#endif /* CONFIG_EEPROM_VERIFY */ - - -bool eeprom_write(e2addr_t addr, const void *buf, size_t count) -{ -#if CONFIG_EEPROM_VERIFY - int retries = 5; - - while (retries--) - if (eeprom_writeRaw(addr, buf, count) - && eeprom_verify(addr, buf, count)) - return true; - - return false; - -#else /* !CONFIG_EEPROM_VERIFY */ - return eeprom_writeRaw(addr, buf, count); -#endif /* !CONFIG_EEPROM_VERIFY */ -} - - -/** - * Copy \c count bytes at address \c addr - * from eeprom to RAM to buffer \c buf. - * - * \return true on success. - */ -bool eeprom_read(e2addr_t addr, void *buf, size_t count) -{ - ASSERT(addr + count <= EEPROM_SIZE); - -#if CONFIG_EEPROM_TYPE == EEPROM_24XX16 - /* - * The 24LC16 uses the slave address as a 3-bit - * block address. - */ - uint8_t blk_addr = (uint8_t)((addr >> 8) & 0x07); - uint8_t blk_offs = (uint8_t)addr; - - bool res = - twi_start_w(EEPROM_ADDR(blk_addr)) - && twi_send(&blk_offs, sizeof blk_offs) - && twi_start_r(EEPROM_ADDR(blk_addr)) - && twi_recv(buf, count); - -#elif CONFIG_EEPROM_TYPE == EEPROM_24XX256 - - // 24LC256 wants big-endian addresses - addr = cpu_to_be16(addr); - - bool res = - twi_start_w(EEPROM_ID) - && twi_send((uint8_t *)&addr, sizeof(addr)) - && twi_start_r(EEPROM_ID) - && twi_recv(buf, count); -#else - #error Unknown device type -#endif - - twi_stop(); - - if (!res) - TRACEMSG("Read error!"); - return res; -} - - -/** - * Write a single character \a c at address \a addr. - */ -bool eeprom_write_char(e2addr_t addr, char c) -{ - return eeprom_write(addr, &c, 1); -} - - -/** - * Read a single character at address \a addr. - * - * \return the requested character or -1 in case of failure. - */ -int eeprom_read_char(e2addr_t addr) -{ - char c; - - if (eeprom_read(addr, &c, 1)) - return c; - else - return -1; -} - - -/** - * Erase specified part of eeprom, writing 0xFF. - * - * \param addr starting address - * \param count length of block to erase - */ -void eeprom_erase(e2addr_t addr, size_t count) -{ - uint8_t buf[EEPROM_BLKSIZE]; - memset(buf, 0xFF, sizeof buf); - - // Clear all but struct hw_info at start of eeprom - while (count) - { - // Long operation, reset watchdog - wdt_reset(); - - size_t size = MIN(count, sizeof buf); - eeprom_write(addr, buf, size); - addr += size; - count -= size; - } -} - - -/** - * Initialize TWI module. - */ -void eeprom_init(void) -{ - twi_init(); -} - - -#ifdef _DEBUG - -#include - -void eeprom_test(void) -{ - static const char magic[14] = "Humpty Dumpty"; - char buf[sizeof magic]; - size_t i; - - // Write something to EEPROM using unaligned sequential writes - for (i = 0; i < 42; ++i) - { - wdt_reset(); - eeprom_write(i * sizeof magic, magic, sizeof magic); - } - - // Read back with single-byte reads - for (i = 0; i < 42 * sizeof magic; ++i) - { - wdt_reset(); - eeprom_read(i, buf, 1); - kprintf("EEPROM byte read: %c (%d)\n", buf[0], buf[0]); - ASSERT(buf[0] == magic[i % sizeof magic]); - } - - // Read back again using sequential reads - for (i = 0; i < 42; ++i) - { - wdt_reset(); - memset(buf, 0, sizeof buf); - eeprom_read(i * sizeof magic, buf, sizeof magic); - kprintf("EEPROM seq read @ 0x%x: '%s'\n", i * sizeof magic, buf); - ASSERT(memcmp(buf, magic, sizeof magic) == 0); - } -} - -#endif // _DEBUG diff --git a/bertos/drv/eeprom_avr.c b/bertos/drv/eeprom_avr.c new file mode 100644 index 00000000..4e7f615f --- /dev/null +++ b/bertos/drv/eeprom_avr.c @@ -0,0 +1,341 @@ +/** + * \file + * + * + * \brief Driver for the 24xx16 and 24xx256 I2C EEPROMS (implementation) + * + * \note This implementation is AVR specific. + * + * \version $Id$ + * \author Stefano Fedrigo + * \author Bernardo Innocenti + */ + +#include "eeprom.h" + +#include +#include // CONFIG_EEPROM_VERIFY +#include // MIN() +#include +#include CPU_HEADER(twi) +#include +#include // cpu_to_be16() + +#include // memset() + + +// Configuration sanity checks +#if !defined(CONFIG_EEPROM_VERIFY) || (CONFIG_EEPROM_VERIFY != 0 && CONFIG_EEPROM_VERIFY != 1) + #error CONFIG_EEPROM_VERIFY must be defined to either 0 or 1 +#endif + +/** + * EEPROM ID code + */ +#define EEPROM_ID 0xA0 + +/** + * This macros form the correct slave address for EEPROMs + */ +#define EEPROM_ADDR(x) (EEPROM_ID | (((uint8_t)(x)) << 1)) + + + + +/** + * Copy \c count bytes from buffer \c buf to + * eeprom at address \c addr. + */ +static bool eeprom_writeRaw(e2addr_t addr, const void *buf, size_t count) +{ + bool result = true; + ASSERT(addr + count <= EEPROM_SIZE); + + while (count && result) + { + /* + * Split write in multiple sequential mode operations that + * don't cross page boundaries. + */ + size_t size = + MIN(count, (size_t)(EEPROM_BLKSIZE - (addr & (EEPROM_BLKSIZE - 1)))); + + #if CONFIG_EEPROM_TYPE == EEPROM_24XX16 + /* + * The 24LC16 uses the slave address as a 3-bit + * block address. + */ + uint8_t blk_addr = (uint8_t)((addr >> 8) & 0x07); + uint8_t blk_offs = (uint8_t)addr; + + result = + twi_start_w(EEPROM_ADDR(blk_addr)) + && twi_send(&blk_offs, sizeof blk_offs) + && twi_send(buf, size); + + #elif CONFIG_EEPROM_TYPE == EEPROM_24XX256 + + // 24LC256 wants big-endian addresses + uint16_t addr_be = cpu_to_be16(addr); + + result = + twi_start_w(EEPROM_ID) + && twi_send((uint8_t *)&addr_be, sizeof addr_be) + && twi_send(buf, size); + + #else + #error Unknown device type + #endif + + twi_stop(); + + // DEBUG + //kprintf("addr=%d, count=%d, size=%d, *#?=%d\n", + // addr, count, size, + // (EEPROM_BLKSIZE - (addr & (EEPROM_BLKSIZE - 1))) + //); + + /* Update count and addr for next operation */ + count -= size; + addr += size; + buf = ((const char *)buf) + size; + } + + if (!result) + TRACEMSG("Write error!"); + return result; +} + + +#if CONFIG_EEPROM_VERIFY +/** + * Check that the contents of an EEPROM range + * match with a provided data buffer. + * + * \return true on success. + */ +static bool eeprom_verify(e2addr_t addr, const void *buf, size_t count) +{ + uint8_t verify_buf[16]; + bool result = true; + + while (count && result) + { + /* Split read in smaller pieces */ + size_t size = MIN(count, sizeof verify_buf); + + /* Read back buffer */ + if (eeprom_read(addr, verify_buf, size)) + { + if (memcmp(buf, verify_buf, size) != 0) + { + TRACEMSG("Data mismatch!"); + result = false; + } + } + else + { + TRACEMSG("Read error!"); + result = false; + } + + /* Update count and addr for next operation */ + count -= size; + addr += size; + buf = ((const char *)buf) + size; + } + + return result; +} +#endif /* CONFIG_EEPROM_VERIFY */ + + +bool eeprom_write(e2addr_t addr, const void *buf, size_t count) +{ +#if CONFIG_EEPROM_VERIFY + int retries = 5; + + while (retries--) + if (eeprom_writeRaw(addr, buf, count) + && eeprom_verify(addr, buf, count)) + return true; + + return false; + +#else /* !CONFIG_EEPROM_VERIFY */ + return eeprom_writeRaw(addr, buf, count); +#endif /* !CONFIG_EEPROM_VERIFY */ +} + + +/** + * Copy \c count bytes at address \c addr + * from eeprom to RAM to buffer \c buf. + * + * \return true on success. + */ +bool eeprom_read(e2addr_t addr, void *buf, size_t count) +{ + ASSERT(addr + count <= EEPROM_SIZE); + +#if CONFIG_EEPROM_TYPE == EEPROM_24XX16 + /* + * The 24LC16 uses the slave address as a 3-bit + * block address. + */ + uint8_t blk_addr = (uint8_t)((addr >> 8) & 0x07); + uint8_t blk_offs = (uint8_t)addr; + + bool res = + twi_start_w(EEPROM_ADDR(blk_addr)) + && twi_send(&blk_offs, sizeof blk_offs) + && twi_start_r(EEPROM_ADDR(blk_addr)) + && twi_recv(buf, count); + +#elif CONFIG_EEPROM_TYPE == EEPROM_24XX256 + + // 24LC256 wants big-endian addresses + addr = cpu_to_be16(addr); + + bool res = + twi_start_w(EEPROM_ID) + && twi_send((uint8_t *)&addr, sizeof(addr)) + && twi_start_r(EEPROM_ID) + && twi_recv(buf, count); +#else + #error Unknown device type +#endif + + twi_stop(); + + if (!res) + TRACEMSG("Read error!"); + return res; +} + + +/** + * Write a single character \a c at address \a addr. + */ +bool eeprom_write_char(e2addr_t addr, char c) +{ + return eeprom_write(addr, &c, 1); +} + + +/** + * Read a single character at address \a addr. + * + * \return the requested character or -1 in case of failure. + */ +int eeprom_read_char(e2addr_t addr) +{ + char c; + + if (eeprom_read(addr, &c, 1)) + return c; + else + return -1; +} + + +/** + * Erase specified part of eeprom, writing 0xFF. + * + * \param addr starting address + * \param count length of block to erase + */ +void eeprom_erase(e2addr_t addr, size_t count) +{ + uint8_t buf[EEPROM_BLKSIZE]; + memset(buf, 0xFF, sizeof buf); + + // Clear all but struct hw_info at start of eeprom + while (count) + { + // Long operation, reset watchdog + wdt_reset(); + + size_t size = MIN(count, sizeof buf); + eeprom_write(addr, buf, size); + addr += size; + count -= size; + } +} + + +/** + * Initialize TWI module. + */ +void eeprom_init(void) +{ + twi_init(); +} + + +#ifdef _DEBUG + +#include + +void eeprom_test(void) +{ + static const char magic[14] = "Humpty Dumpty"; + char buf[sizeof magic]; + size_t i; + + // Write something to EEPROM using unaligned sequential writes + for (i = 0; i < 42; ++i) + { + wdt_reset(); + eeprom_write(i * sizeof magic, magic, sizeof magic); + } + + // Read back with single-byte reads + for (i = 0; i < 42 * sizeof magic; ++i) + { + wdt_reset(); + eeprom_read(i, buf, 1); + kprintf("EEPROM byte read: %c (%d)\n", buf[0], buf[0]); + ASSERT(buf[0] == magic[i % sizeof magic]); + } + + // Read back again using sequential reads + for (i = 0; i < 42; ++i) + { + wdt_reset(); + memset(buf, 0, sizeof buf); + eeprom_read(i * sizeof magic, buf, sizeof magic); + kprintf("EEPROM seq read @ 0x%x: '%s'\n", i * sizeof magic, buf); + ASSERT(memcmp(buf, magic, sizeof magic) == 0); + } +} + +#endif // _DEBUG