root / trunk / code / projects / test / test_eeprom.c @ 1383
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| 1 | 853 | bneuman | /** @file testeeprom.c
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| 2 | * @brief tests the eeprom code
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| 3 | *
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| 4 | * stores and retrives a value, then sets it back to what it was
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| 5 | */
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| 6 | #include <dragonfly_lib.h> |
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| 7 | 858 | dsschult | #include "eeprom.h" |
| 8 | 853 | bneuman | |
| 9 | #define ADDR 0 |
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| 10 | |||
| 11 | int testeeprom(void) { |
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| 12 | unsigned char data, data2; |
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| 13 | int ret;
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| 14 | int worked=1; |
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| 15 | |||
| 16 | |||
| 17 | /* read whats there */
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| 18 | ret = eeprom_get_byte(ADDR, &data); |
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| 19 | |||
| 20 | if(ret) {
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| 21 | usb_puts("Error reading intial value! return code: ");
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| 22 | usb_puti(ret); |
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| 23 | usb_puts(" data: ");
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| 24 | usb_puti(data); |
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| 25 | usb_puts("\r\n");
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| 26 | worked=0;
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| 27 | } |
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| 28 | else {
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| 29 | usb_puts("data was: ");
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| 30 | usb_puti(data); |
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| 31 | usb_puts("\r\n");
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| 32 | } |
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| 33 | |||
| 34 | /* write something new */
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| 35 | |||
| 36 | ret = eeprom_put_byte(ADDR, 123);
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| 37 | if(ret) {
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| 38 | usb_puts("Error writing data! return code: ");
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| 39 | usb_puti(ret); |
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| 40 | usb_puts("\r\n");
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| 41 | worked=0;
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| 42 | } |
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| 43 | else {
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| 44 | usb_puts("wrote 123\r\n");
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| 45 | } |
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| 46 | |||
| 47 | |||
| 48 | /* check if tis really there */
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| 49 | |||
| 50 | ret = eeprom_get_byte(ADDR, &data2); |
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| 51 | |||
| 52 | if(ret) {
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| 53 | usb_puts("Error reading second value! return code: ");
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| 54 | usb_puti(ret); |
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| 55 | usb_puts(" data: ");
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| 56 | usb_puti(data2); |
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| 57 | usb_puts("\r\n");
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| 58 | worked=0;
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| 59 | } |
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| 60 | else {
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| 61 | if(data2==123) { |
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| 62 | usb_puts("data write and re-read worked!\r\n");
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| 63 | } |
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| 64 | else {
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| 65 | usb_puts("data re-read returned 0 but data was ");
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| 66 | usb_puti(data2); |
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| 67 | usb_puts("\r\n");
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| 68 | worked=0;
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| 69 | } |
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| 70 | } |
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| 71 | |||
| 72 | |||
| 73 | /* restore old value */
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| 74 | |||
| 75 | ret = eeprom_put_byte(ADDR, 123);
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| 76 | if(ret) {
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| 77 | usb_puts("Error writing data the second time! return code: ");
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| 78 | usb_puti(ret); |
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| 79 | usb_puts("\r\n");
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| 80 | worked=0;
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| 81 | } |
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| 82 | else {
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| 83 | usb_puts("re-wrote original data: ");
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| 84 | usb_puti(data); |
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| 85 | usb_puts("\r\n");
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| 86 | } |
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| 87 | |||
| 88 | return worked;
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| 89 | } |