Abstract: The present disclosure relates to the technical field of a multi-chip system, and provides a master chip, a salve chip, and an inter-chip DMA transmission system. The master chip is connected to the slave chip through at least one first transmission channel (17) and a second transmission channel (18). The master chip includes a DMA controller (2) and an MCU (3). For each of the first transmission channels, when it is detected that any first transmission channel (17) is in an idle state, the MCU (3) configures one of a plurality of first peripherals (12) of the slave chip into a DMA mode. The DMA controller (2) is configured to receive, through the first transmission channel (17), a DMA request (req_s_0-req_s_N) generated by the first peripheral (12) in the DMA mode, and obtain a DMA data of the first peripheral (12) through the second transmission channel (18).

Abstract: The present disclosure relates to the field of a multi-chip system, and provides an interrupt processing method, a master chip, a slave chip, and a multi-chip system. An interrupt processing method is applied to a master chip and includes: when an interrupt transport request sent by a slave chip through an interrupt line is detected, obtaining all current interrupt requests (irq_s_1-irq_s_N) of the slave chip, the interrupt request (irq_s_1_-irq_s_N) is generated by a first peripheral (4) of the slave chip; obtaining an interrupt subroutine corresponding to each of the interrupt requests (irq_s_1-irq_s_N), and processing the corresponding interrupt request (irq_s_1-irq_s_N) by using the interrupt subroutine. In the embodiments of the present disclosure, all the interrupt requests (irq_s_1-irq_s_N) of the slave chip are mapped to the master chip, so that the interrupt processing flow of the peripheral on the slave chip is simplified.

Abstract: A method for determining a target operating frequency of a stylus, and a touch screen and a stylus thereof are disclosed, pertaining to the field of touch technologies. According to embodiments of the present application, a touch screen receives a search signal sent by the stylus and detects the frequency of the search signal, and judges whether the frequency of the search signal is equal to a target operating frequency of the touch screen; and if the frequency of the search signal is equal to the target operating frequency, the touch screen sends a response signal to the stylus, whereupon the stylus determines a current operating frequency thereof as the target operating frequency. As compared with the related art, the method has the advantages such as simple use, high reliability and the like.

Abstract: The present disclosure relates to the technical field of a multi-chip system, and provides a master chip, a salve chip, and an inter-chip DMA transmission system. The master chip is connected to the slave chip through at least one first transmission channel (17) and a second transmission channel (18). The master chip includes a DMA controller (2) and an MCU (3). For each of the first transmission channels, when it is detected that any first transmission channel (17) is in an idle state, the MCU (3) configures one of a plurality of first peripherals (12) of the slave chip into a DMA mode. The DMA controller (2) is configured to receive, through the first transmission channel (17), a DMA request (req_s_0-req_s_N) generated by the first peripheral (12) in the DMA mode, and obtain a DMA data of the first peripheral (12) through the second transmission channel (18).

Abstract: The present disclosure relates to the field of a multi-chip system, and provides an interrupt processing method, a master chip, a slave chip, and a multi-chip system. An interrupt processing method is applied to a master chip and includes: when an interrupt transport request sent by a slave chip through an interrupt line is detected, obtaining all current interrupt requests (irq_s_1-irq_s N) of the slave chip, the interrupt request (irq_s_1_-irq_s_N) is generated by a first peripheral (4) of the slave chip; obtaining an interrupt subroutine corresponding to each of the interrupt requests (irq_s_1-irq_s N), and processing the corresponding interrupt request (irq_s_1-irq_s N) by using the interrupt subroutine. In the embodiments of the present disclosure, all the interrupt requests (irq_s_1-irq_s_N) of the slave chip are mapped to the master chip, so that the interrupt processing flow of the peripheral on the slave chip is simplified.

Abstract: A method for determining a target operating frequency of a stylus, and a touch screen and a stylus thereof are disclosed, pertaining to the field of touch technologies. According to embodiments of the present application, a touch screen receives a search signal sent by the stylus and detects the frequency of the search signal, and judges whether the frequency of the search signal is equal to a target operating frequency of the touch screen; and if the frequency of the search signal is equal to the target operating frequency, the touch screen sends a response signal to the stylus, whereupon the stylus determines a current operating frequency thereof as the target operating frequency. As compared with the related art, the method has the advantages such as simple use, high reliability and the like.