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authorGravatar Nick Brassel <nick@tzarc.org>2019-11-06 08:04:50 +1100
committerGravatar Nick Brassel <nick@tzarc.org>2020-01-24 12:45:58 +1100
commitd13ada11622977bcc0b530212b4405229805016d (patch)
tree3f8874ac3c9b5950b1fed6ac4d0081a268d9f487 /drivers/eeprom/eeprom_driver.c
parent6ff093efbee21d3f64f5b4bfdbc66d4648490523 (diff)
downloadqmk_firmware-d13ada11622977bcc0b530212b4405229805016d.tar.gz
Add customisable EEPROM driver selection (#7274)
- uprintf -> dprintf - Fix atsam "vendor" eeprom. - Bump Kinetis K20x to 64 bytes, too. - Rollback Kinetis to 32 bytes as partitioning can only be done once. Add warning about changing the value. - Change RAM-backed "fake" EEPROM implementations to match eeconfig's current usage. - Add 24LC128 by request.
Diffstat (limited to 'drivers/eeprom/eeprom_driver.c')
-rw-r--r--drivers/eeprom/eeprom_driver.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/drivers/eeprom/eeprom_driver.c b/drivers/eeprom/eeprom_driver.c
new file mode 100644
index 000000000..3835e5e9d
--- /dev/null
+++ b/drivers/eeprom/eeprom_driver.c
@@ -0,0 +1,73 @@
+/* Copyright 2019 Nick Brassel (tzarc)
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+#include <string.h>
+
+#include "eeprom_driver.h"
+
+uint8_t eeprom_read_byte(const uint8_t *addr) {
+ uint8_t ret;
+ eeprom_read_block(&ret, addr, 1);
+ return ret;
+}
+
+uint16_t eeprom_read_word(const uint16_t *addr) {
+ uint16_t ret;
+ eeprom_read_block(&ret, addr, 2);
+ return ret;
+}
+
+uint32_t eeprom_read_dword(const uint32_t *addr) {
+ uint32_t ret;
+ eeprom_read_block(&ret, addr, 4);
+ return ret;
+}
+
+void eeprom_write_byte(uint8_t *addr, uint8_t value) { eeprom_write_block(&value, addr, 1); }
+
+void eeprom_write_word(uint16_t *addr, uint16_t value) { eeprom_write_block(&value, addr, 2); }
+
+void eeprom_write_dword(uint32_t *addr, uint32_t value) { eeprom_write_block(&value, addr, 4); }
+
+void eeprom_update_block(const void *buf, void *addr, size_t len) {
+ uint8_t read_buf[len];
+ eeprom_read_block(read_buf, addr, len);
+ if (memcmp(buf, read_buf, len) != 0) {
+ eeprom_write_block(buf, addr, len);
+ }
+}
+
+void eeprom_update_byte(uint8_t *addr, uint8_t value) {
+ uint8_t orig = eeprom_read_byte(addr);
+ if (orig != value) {
+ eeprom_write_byte(addr, value);
+ }
+}
+
+void eeprom_update_word(uint16_t *addr, uint16_t value) {
+ uint16_t orig = eeprom_read_word(addr);
+ if (orig != value) {
+ eeprom_write_word(addr, value);
+ }
+}
+
+void eeprom_update_dword(uint32_t *addr, uint32_t value) {
+ uint32_t orig = eeprom_read_dword(addr);
+ if (orig != value) {
+ eeprom_write_dword(addr, value);
+ }
+}