diff options
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/m0eepromtest/m0eepromtest.ino | 189 |
1 files changed, 147 insertions, 42 deletions
diff --git a/examples/m0eepromtest/m0eepromtest.ino b/examples/m0eepromtest/m0eepromtest.ino index 52b1f6b..d4547e9 100644 --- a/examples/m0eepromtest/m0eepromtest.ino +++ b/examples/m0eepromtest/m0eepromtest.ino @@ -1,9 +1,20 @@ // m0eepromtest.ino - some simple tests of the m0eeprom library -#include "m0eeprom.h" +#include "m0EEPROM.h" uint8_t rdata[32]; +// prototypes +//void read_after_reset(); +void test_simple_read_write_one_byte(); +void test_simple_read_write_two_bytes(); +void test_write_one_byte_doesnt_erase_second_byte_in_memory(); +void test_write_and_read_a_string(); +void test_multiple_string_writes_over_page_boundaries(); +void test_multiple_string_writes_over_page_boundaries(uint32_t offset); +void write_an_arbitrary_structure_to_eeprom(); +void clear_eeprom_bytes(uint16_t offset); + void setup(void) { Serial.begin(9600); @@ -11,37 +22,145 @@ void setup(void) delay( 1 ); } Serial.flush(); + Eeprom.begin(); + +// read_after_reset(); + clear_eeprom_bytes(0x40); + test_simple_read_write_one_byte(); + test_simple_read_write_two_bytes(); + test_write_one_byte_doesnt_erase_second_byte_in_memory(); + test_write_and_read_a_string(); + + // offset for write start = 0 + test_multiple_string_writes_over_page_boundaries(); + // offset for write start = 27 + test_multiple_string_writes_over_page_boundaries(27); + write_an_arbitrary_structure_to_eeprom(); - Wire.begin(); +} - size_t i; - // define large string of data to be written - cleareeprom(); +void loop(){ +} + +/* start tests */ +// two one-byte reads to be used after a reset to ensure that eeprom is stable. +// enable after you run tests once. +/* +void read_after_reset() { + unsigned int address = 0; + Serial.println("read_after_reset begin"); + Serial.println(Eeprom.read_byte(address), DEC); + Serial.println(Eeprom.read_byte(address+1), DEC); + + Serial.println("read_after_reset end"); +} +*/ +void test_simple_read_write_one_byte() { + unsigned int address = 0x40; + Serial.println("test_simple_read_write_one_byte begin"); +// Eeprom.write_byte(address, 0); + uint8_t w = 123; + Eeprom.write_byte(address, w); + + Serial.println(Eeprom.read_byte(address), DEC); + Serial.println("test_simple_read_write_one_byte end"); +} + +void test_simple_read_write_two_bytes() { + unsigned int address = 0; + Serial.println("test_simple_read_write_two_bytes begin"); + Eeprom.write_byte(address, (uint8_t) 123); + Eeprom.write_byte(address+1, 66); + + Serial.println(Eeprom.read_byte(address), DEC); + Serial.println(Eeprom.read_byte(address+1), DEC); + + Serial.println("test_simple_read_write_two_bytes end"); +} + +// The second byte in memory is preserved here +void test_write_one_byte_doesnt_erase_second_byte_in_memory() { + uint16_t address = 0; + Serial.println("test_write_one_byte_doesnt_erase_second_byte_in_memory begin"); + Eeprom.write_byte(address, 123); + Eeprom.write_byte(address+1, 66); + + Eeprom.write_byte(address, 1); + + Serial.println(Eeprom.read_byte(address), DEC); + Serial.println(Eeprom.read_byte(address+1), DEC); + + Serial.println("test_write_one_byte_doesnt_erase_second_byte_in_memory end"); + +} + +void test_write_and_read_a_string() { + char p[] = "Once again."; + uint16_t psize = strlen(p)+1; + uint8_t recv[psize]; // where to put the result + uint16_t address = 0; + Serial.println("test_write_and_read_a_string begin"); + + Serial.println(p); + uint8_t* rp = (uint8_t*)p; + + for (uint8_t i=0; i<psize; i++) { + Serial.print(rp[i], HEX); + } + Serial.println(); + + Eeprom.write_bytes(address, rp, psize); + uint8_t* r = Eeprom.read_bytes(address, recv, psize); + + if (r != 0) { + // Serial.println("error"); + Serial.print((char*)r);Serial.println(); + } + + + for (uint8_t i=0; i<psize; i++) { + Serial.print(recv[i], HEX); + } + Serial.println(); + + Serial.println((char*)recv); + Serial.println("test_write_and_read_a_string end"); +} + +void test_multiple_string_writes_over_page_boundaries(){ + test_multiple_string_writes_over_page_boundaries(0); +} + +void test_multiple_string_writes_over_page_boundaries(uint32_t offset){ + size_t i = 0; + + // define large string of data to be written char str_data[]={"Hello-1234567890-and-abcdefghijklmnopqrstuvwxyz-Goodbye\n"}; size_t str_len = strlen(str_data); - // Work out length of data -// char str_len=0; -// do{ str_len++; } while(str_data[str_len]); + Serial.print("string length = "); Serial.println(str_len); + // Write out data several times consecutively starting at address 0 - for(i=0;i<WRITE_CNT;i++) writeEEPROM(eeprom1,i*str_len,(uint8_t*)str_data, str_len); + for (i=0;i<10;i++) Eeprom.write_bytes(i*str_len+offset,(uint8_t*)str_data, str_len); // read back the data 28 bytes at a time // reading data doesn't suffer from the page boundary rules Serial.println("DATA READ"); for(i=0;i<20;i++) { - readEEPROM(eeprom1, (i*28), rdata, 28); + Eeprom.read_bytes((i*28)+offset, rdata, 28); Serial.write(rdata,28); } +} -// write a structure +void write_an_arbitrary_structure_to_eeprom(){ + // write a structure typedef struct Foo { int x; float f; char c; - char s[10]; + char s[10] = {0}; } Foo; Foo foo; @@ -51,29 +170,14 @@ void setup(void) strcpy(foo.s, "Hello"); size_t len = sizeof(foo); - Serial.print("sizeof(foo) = ");Serial.print(sizeof(foo));Serial.println(); - Serial.print("sizeof(int) = ");Serial.print(sizeof(int));Serial.println(); - Serial.print("sizeof(float) = ");Serial.print(sizeof(float));Serial.println(); + Serial.print("sizeof(foo) = ");Serial.print(len);Serial.println(); char hexchr[2]; // for printing uint8_t rdbuf[len]; - for (int j=0; j<len; j++) rdbuf[j]=0; - for (int j=0; j<len; j++) { - sprintf(hexchr, "%02X", rdbuf[j]); - Serial.print(hexchr); - } - Serial.println(); - - // some debugging uint8_t* p = (uint8_t*)&foo; - for (int j=0; j<len; j++) { - sprintf(hexchr, "%02X", p[j]); - Serial.print(hexchr); - } - Serial.println(); - - writeEEPROM(eeprom1,1000,p, len); - readEEPROM(eeprom1,1000, rdbuf, len); + + Eeprom.write_bytes(0,p, len); + Eeprom.read_bytes(0, rdbuf, len); Foo* bar = (Foo*) &rdbuf; Serial.print("bar->x = ");Serial.print(bar->x);Serial.println(); @@ -84,21 +188,22 @@ void setup(void) // print rdbuf size for (size_t i = 0; i < len; ++i){ sprintf(hexchr, "%02X", rdbuf[i]); - Serial.print("rdbuf[");Serial.print(i);Serial.print("] = ");Serial.print(hexchr);Serial.println(); + Serial.print(hexchr); } + Serial.println(); } -void cleareeprom() { - char Clear[] ={"000000000000000000000000000000000000000000000000000000000000000"}; - // Work out length of data - char str_len=0; - do{ str_len++; } while(Clear[str_len]); +void clear_eeprom_bytes(uint16_t offset){ + // write zeros for 10 bytes starting at offset. + Serial.println("clear_eeprom_bytes begin"); + uint8_t buff[10] = {0}; + Eeprom.write_bytes(offset, buff, 10); - // Write out data several times consecutively starting at address 0 - for(size_t i=0;i<WRITE_CNT;i++) writeEEPROM(eeprom1,i*str_len,(uint8_t*)Clear, str_len); + uint8_t read_buff[10]; + Eeprom.read_bytes(offset, read_buff, 10); + Serial.println((byte) read_buff[1], DEC); + Serial.println("clear_eeprom_bytes end"); -} - -void loop(){ + } |