CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=6.1.x 2020-01-06T13:51:41+00:00 2020-01-06T13:51:41+00:00 Jeff Epler jepler@gmail.com 2020-01-06T13:51:41+00:00 urn:sha1:dc729718eb2980e3b92a54e4cc60c7d6b0720e8a 2020-01-02T21:23:42+00:00 Jeff Epler jepler@gmail.com 2020-01-02T21:23:42+00:00 urn:sha1:ec22520992723a89dbc57a5e59bf03815df9f509 This lets a music player show it vu-meter style 2019-12-12T14:44:15+00:00 Jeff Epler jepler@gmail.com 2019-12-12T14:44:15+00:00 urn:sha1:1cdac3f16a9244c992e8494a7246ab643cdb47c0 There were several problems with the way this worked -- the read_count approach was too complicated and I made a mistake "simplifying" it from WaveFile. And when the right channel was returned, it was off by 1 byte, making it into static. Instead, directly track which is the "other" channel that has data available, and by using the right data type make the "+ channel" arithmetic give the right result. This requires a double cast (int16_t*)(void*) due to an alignment warning; the alignment is now ensured manually, but the compiler doesn't make the necessary inference that the low address bit must be clear. 2019-12-10T20:03:06+00:00 Jeff Epler jepler@gmail.com 2019-11-26T15:29:55+00:00 urn:sha1:a08d9e6d8e0059c8aa59feadd7b94d95d691e273