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8 Commits

Author SHA1 Message Date
Randy Mackay 80059d3516 AP_HAL_AVR: resolve compiler warning 2013-11-16 16:58:32 +09:00
Andrew Tridgell 08a6503364 HAL_AVR: force all devices on SPI0 to low speed when one is low speed 
this forces MS5611 to low speed when MPU6K is low speed
 2013-11-15 21:58:30 +09:00
Andrew Tridgell 11e1cf31c4 HAL_AVR: changed to 16 byte bulk transfer on SPI0 2013-11-07 12:48:16 +11:00
Andrew Tridgell 04836ea763 HAL_AVR: set initial bus speed on MPU6k to 500kHz, then change to 8MHz 
this should allow us to work even with older chips. See the MPU6000
product specification, which says max 20MHz for sensor and interrupt
regs, and max 1MHz for all other regs
 2013-10-13 11:03:06 +09:00
Andrew Tridgell 5ba34b38c1 HAL_AVR: added specialised transfer functions for MPU6k and APM1 ADC 
this saves quite a lot of time in interrupts
 2013-10-13 11:02:57 +09:00
Andrew Tridgell b5b7fd2f9a HAL_AVR: added bulk transfer() method 
this is quite a lot faster than the byte at a time method
 2013-01-13 17:31:42 +11:00
Pat Hickey 4fe889c9c5 AP_HAL_AVR: Implement bulk SPI transaction 2012-12-20 14:52:32 +11:00
Pat Hickey f543cede01 AP_HAL & AP_HAL_AVR: new SPI driver model 2012-12-20 14:51:31 +11:00