Texas Instruments Tiva TM4C123GH6PM, User Manual

Page: 187 / 352

Synchronous Serial Interface (SSI)
Returns:
None.
17.2.1.3 ROM_SSIClockSourceSet
Sets the data clock source for the specified SSI peripheral.
Prototype:
void
ROM_SSIClockSourceSet(uint32_t ui32Base,
uint32_t ui32Source)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_SSITABLE
is an array of pointers located at
ROM_APITABLE[2]
.
ROM_SSIClockSourceSet
is a function pointer located at
ROM_SSITABLE[16]
.
Parameters:
ui32Base
is the base address of the SSI port.
ui32Source is the baud clock source for the SSI.
Description:
This function allows the baud clock source for the SSI to be selected. The possible clock
source are the system clock (
SSI_CLOCK_SYSTEM
) or the precision internal oscillator
(
SSI_CLOCK_PIOSC
).
Changing the baud clock source will change the data rate generated by the SSI. Therefore, the
data rate should be reconfigured after any change to the SSI clock source.
Returns:
None.
17.2.1.4 ROM_SSIConfigSetExpClk
Configures the synchronous serial interface.
Prototype:
void
ROM_SSIConfigSetExpClk(uint32_t ui32Base,
uint32_t ui32SSIClk,
uint32_t ui32Protocol,
uint32_t ui32Mode,
uint32_t ui32BitRate,
uint32_t ui32DataWidth)
ROM Location:
ROM_APITABLE
is an array of pointers located at
0x0100.0010
.
ROM_SSITABLE
is an array of pointers located at
ROM_APITABLE[2]
.
ROM_SSIConfigSetExpClk
is a function pointer located at
ROM_SSITABLE[1]
.
Parameters:
ui32Base specifies the SSI module base address.
April 8, 2013 187