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ulisp-picocalc
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Version 2.7b - 9th June 2019 

Change to (scn)
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David Johnson-Davies 2019-06-09 11:18:39 +01:00 committed by GitHub
parent d83f40652d
commit 774cf149c4
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1 changed files with 18 additions and 13 deletions
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31
ulisp-arm.ino
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@ -1,5 +1,5 @@
/* uLisp ARM 2.7 - www.ulisp.com
David Johnson-Davies - www.technoblogy.com - 20th May 2019
/* uLisp ARM 2.7b - www.ulisp.com
David Johnson-Davies - www.technoblogy.com - 9th June 2019
Licensed under the MIT license: https://opensource.org/licenses/MIT
*/
@ -1086,33 +1086,38 @@ inline object *cdrx (object *arg) {
// I2C interface
void I2Cinit(bool enablePullup) {
void I2Cinit (bool enablePullup) {
(void) enablePullup;
Wire.begin();
}
inline uint8_t I2Cread() {
inline uint8_t I2Cread () {
return Wire.read();
}
inline bool I2Cwrite(uint8_t data) {
inline bool I2Cwrite (uint8_t data) {
return Wire.write(data);
}
bool I2Cstart(uint8_t address, uint8_t read) {
if (read == 0) Wire.beginTransmission(address);
else Wire.requestFrom(address, I2CCount);
return true;
bool I2Cstart (uint8_t address, uint8_t read) {
int ok = true;
if (read == 0) {
Wire.beginTransmission(address);
ok = (Wire.endTransmission(true) == 0);
Wire.beginTransmission(address);
}
else Wire.requestFrom(address, I2CCount);
return ok;
}
bool I2Crestart(uint8_t address, uint8_t read) {
bool I2Crestart (uint8_t address, uint8_t read) {
int error = (Wire.endTransmission(false) != 0);
if (read == 0) Wire.beginTransmission(address);
else Wire.requestFrom(address, I2CCount);
return error ? false : true;
}
void I2Cstop(uint8_t read) {
void I2Cstop (uint8_t read) {
if (read == 0) Wire.endTransmission(); // Check for error?
}
@ -2981,7 +2986,7 @@ object *fn_writeline (object *args, object *env) {
object *fn_restarti2c (object *args, object *env) {
(void) env;
int stream = first(args)->integer;
int stream = istream(first(args));
args = cdr(args);
int read = 0; // Write
I2CCount = 0;
@ -2991,7 +2996,7 @@ object *fn_restarti2c (object *args, object *env) {
read = (rw != NULL);
}
int address = stream & 0xFF;
if (stream>>8 != I2CSTREAM) error3(RESTARTI2C, PSTR("not i2c"));
if (stream>>8 != I2CSTREAM) error3(RESTARTI2C, PSTR("not an i2c stream"));
return I2Crestart(address, read) ? tee : nil;
}